125687500 has 42 divisors (see below), whose sum is σ = 275074604. Its totient is φ = 50250000.

The previous prime is 125687473. The next prime is 125687519. The reversal of 125687500 is 5786521.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 61495 + ... + 63505.

Almost surely, 2^125687500 is an apocalyptic number.

125687500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125687500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137537302).

125687500 is an abundant number, since it is smaller than the sum of its proper divisors (149387104).

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

125687500 is an frugal number, since it uses more digits than its factorization.

125687500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 125687500 is about 11211.0436623893. The cubic root of 125687500 is about 500.9149912274.

The spelling of 125687500 in words is "one hundred twenty-five million, six hundred eighty-seven thousand, five hundred".