100621125 has 96 divisors (see below), whose sum is σ = 203254272. Its totient is φ = 47472000.

The previous prime is 100621117. The next prime is 100621177. The reversal of 100621125 is 521126001.

It is not a de Polignac number, because 100621125 - 2³ = 100621117 is a prime.

It is a super-2 number, since 2×100621125² = 20249221592531250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100621098 and 100621107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 581539 + ... + 581711.

It is an arithmetic number, because the mean of its divisors is an integer number (2117232).

Almost surely, 2^100621125 is an apocalyptic number.

100621125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100621125 is an abundant number, since it is smaller than the sum of its proper divisors (102633147).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100621125 is a wasteful number, since it uses less digits than its factorization.

100621125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 100621125 is about 10031.0081746552. The cubic root of 100621125 is about 465.1179028117.

Adding to 100621125 its reverse (521126001), we get a palindrome (621747126).

The spelling of 100621125 in words is "one hundred million, six hundred twenty-one thousand, one hundred twenty-five".