125621968 has 20 divisors (see below), whose sum is σ = 251786340. Its totient is φ = 60644864.

The previous prime is 125621941. The next prime is 125621971. The reversal of 125621968 is 869126521.

It can be written as a sum of positive squares in 2 ways, for example, as 66455104 + 59166864 = 8152^2 + 7692^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125621968.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134905 + ... + 135832.

It is an arithmetic number, because the mean of its divisors is an integer number (12589317).

Almost surely, 2^125621968 is an apocalyptic number.

It is an amenable number.

125621968 is an abundant number, since it is smaller than the sum of its proper divisors (126164372).

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

125621968 is a wasteful number, since it uses less digits than its factorization.

125621968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270774 (or 270768 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 125621968 is about 11208.1206274736. The cubic root of 125621968 is about 500.8279190102.

The spelling of 125621968 in words is "one hundred twenty-five million, six hundred twenty-one thousand, nine hundred sixty-eight".