125978 has 4 divisors (see below), whose sum is σ = 188970. Its totient is φ = 62988.

The previous prime is 125963. The next prime is 126001. The reversal of 125978 is 879521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879521 = 109 ⋅8069.

It can be written as a sum of positive squares in only one way, i.e., 124609 + 1369 = 353^2 + 37^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 125978.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31493 + ... + 31496.

2¹²⁵⁹⁷⁸ is an apocalyptic number.

125978 is a deficient number, since it is larger than the sum of its proper divisors (62992).

125978 is an equidigital number, since it uses as much as digits as its factorization.

125978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62991.

The product of its digits is 5040, while the sum is 32.

The square root of 125978 is about 354.9337966438. The cubic root of 125978 is about 50.1300613874.

The spelling of 125978 in words is "one hundred twenty-five thousand, nine hundred seventy-eight".