2,561,763

3 × 23 × 137 × 271

2,561,763 has digital root 3. The neighboring primes are 2561761 and 2561771; its proper-divisor sum differs from the starting integer by -1,520,070.

Prime Factor Structure

Factorization String 3 × 23 × 137 × 271

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 3,603,456

Proper Divisor Sum 1,041,693

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #2561761 ← → #2561771

1 3 23 69 137 271 411 813 3,151 6,233 9,453 18,699 37,127 111,381 853,921 2,561,763

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

2,561,763 7,685,290 3,842,645 11,527,936 5,763,968 2,881,984 1,440,992 720,496 360,248 180,124 90,062 45,031 135,094 67,547 202,642 101,321 303,964 151,982 75,991 227,974 113,987 341,962 170,981 512,944 256,472 128,236 64,118 32,059 96,178 48,089 144,268 72,134 36,067 108,202 54,101 162,304 81,152 40,576 20,288 10,144 5,072 2,536 1,268 634 317 952 476 238 119 358 179 538 269 808 404 202 101 304 152 76