1,616,556

2² × 3 × 107 × 1259

1,616,556 has digital root 3. The neighboring primes are 1616551 and 1616569; its proper-divisor sum differs from the starting integer by 577,128.

Prime Factor Structure

Factorization String 2^2 × 3 × 107 × 1259

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Total Divisors 24

Divisor Sum (σ) 3,810,240

Proper Divisor Sum 2,193,684

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #1616551 ← → #1616569

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

1,616,556 808,278 404,139 1,212,418 606,209 1,818,628 909,314 454,657 1,363,972 681,986 340,993 1,022,980 511,490 255,745 767,236 383,618 191,809 575,428 287,714 143,857 431,572 215,786 107,893 323,680 161,840 80,920 40,460 20,230 10,115 30,346 15,173 45,520 22,760 11,380 5,690 2,845 8,536 4,268 2,134 1,067 3,202 1,601 4,804 2,402 1,201 3,604 1,802 901 2,704 1,352 676 338 169 508 254 127 382 191 574 287