125661864 has 32 divisors (see below), whose sum is σ = 314601120. Its totient is φ = 41827776.

The previous prime is 125661829. The next prime is 125661919. The reversal of 125661864 is 468166521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15562 + ... + 22214.

It is an arithmetic number, because the mean of its divisors is an integer number (9831285).

Almost surely, 2^125661864 is an apocalyptic number.

It is an amenable number.

125661864 is an abundant number, since it is smaller than the sum of its proper divisors (188939256).

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

125661864 is a wasteful number, since it uses less digits than its factorization.

125661864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7449 (or 7445 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 125661864 is about 11209.9002671745. The cubic root of 125661864 is about 500.8809323382.

The spelling of 125661864 in words is "one hundred twenty-five million, six hundred sixty-one thousand, eight hundred sixty-four".