125693978 has 8 divisors (see below), whose sum is σ = 189364980. Its totient is φ = 62572320.

The previous prime is 125693959. The next prime is 125693983. The reversal of 125693978 is 879396521.

It can be written as a sum of positive squares in 2 ways, for example, as 100060009 + 25633969 = 10003^2 + 5063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×125693978² = 31597952210928968, which contains 22 as substring.

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, 136763 + ... + 137678.

Almost surely, 2^125693978 is an apocalyptic number.

125693978 is a deficient number, since it is larger than the sum of its proper divisors (63671002).

125693978 is a wasteful number, since it uses less digits than its factorization.

125693978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274672.

The product of its digits is 816480, while the sum is 50.

The square root of 125693978 is about 11211.3325702166. The cubic root of 125693978 is about 500.9235968871.

The spelling of 125693978 in words is "one hundred twenty-five million, six hundred ninety-three thousand, nine hundred seventy-eight".