1,377,280

2¹⁰ × 5 × 269

1,377,280 has digital root 1. The neighboring primes are 1377269 and 1377281; its proper-divisor sum differs from the starting integer by 561,580.

Prime Factor Structure

Factorization String 2^10 × 5 × 269

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Total Divisors 44

Divisor Sum (σ) 3,316,140

Proper Divisor Sum 1,938,860

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #1377269 ← → #1377281

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

1,377,280 688,640 344,320 172,160 86,080 43,040 21,520 10,760 5,380 2,690 1,345 4,036 2,018 1,009 3,028 1,514 757 2,272 1,136 568 284 142 71 214 107 322 161 484 242 121 364 182 91 274 137 412 206 103 310 155 466 233 700 350 175 526 263 790 395 1,186 593 1,780 890 445 1,336 668 334 167 502 251