125864978 has 6 divisors (see below), whose sum is σ = 188821269. Its totient is φ = 62924556.

The previous prime is 125864953. The next prime is 125865007. The reversal of 125864978 is 879468521.

It can be written as a sum of positive squares in 2 ways, for example, as 119749249 + 6115729 = 10943^2 + 2473^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7933.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11900 + ... + 19832.

Almost surely, 2^125864978 is an apocalyptic number.

125864978 is a deficient number, since it is larger than the sum of its proper divisors (62956291).

125864978 is an frugal number, since it uses more digits than its factorization.

125864978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15868 (or 7935 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 125864978 is about 11218.9561903058. The cubic root of 125864978 is about 501.1506539596.

Multiplying 125864978 by its sum of digits (50), we get a square (6293248900 = 79330²).

The spelling of 125864978 in words is "one hundred twenty-five million, eight hundred sixty-four thousand, nine hundred seventy-eight".