125779138 has 8 divisors (see below), whose sum is σ = 190537020. Its totient is φ = 62266800.

The previous prime is 125779117. The next prime is 125779163. The reversal of 125779138 is 831977521.

It can be written as a sum of positive squares in 2 ways, for example, as 104591529 + 21187609 = 10227^2 + 4603^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 125779094 and 125779103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311133 + ... + 311536.

Almost surely, 2^125779138 is an apocalyptic number.

125779138 is a deficient number, since it is larger than the sum of its proper divisors (64757882).

125779138 is a wasteful number, since it uses less digits than its factorization.

125779138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622772.

The product of its digits is 105840, while the sum is 43.

The square root of 125779138 is about 11215.1298699569. The cubic root of 125779138 is about 501.0366996886.

The spelling of 125779138 in words is "one hundred twenty-five million, seven hundred seventy-nine thousand, one hundred thirty-eight".