125551100 has 36 divisors (see below), whose sum is σ = 278253024. Its totient is φ = 49150080.

The previous prime is 125551093. The next prime is 125551123. The reversal of 125551100 is 1155521.

It is a happy number.

It is a super-2 number, since 2×125551100² = 31526157422420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8657 + ... + 18056.

Almost surely, 2^125551100 is an apocalyptic number.

125551100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125551100 is an abundant number, since it is smaller than the sum of its proper divisors (152701924).

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

125551100 is a wasteful number, since it uses less digits than its factorization.

125551100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26774 (or 26767 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 125551100 is about 11204.9587237080. The cubic root of 125551100 is about 500.7337227751.

The spelling of 125551100 in words is "one hundred twenty-five million, five hundred fifty-one thousand, one hundred".