125765139 has 4 divisors (see below), whose sum is σ = 167686856. Its totient is φ = 83843424.

The previous prime is 125765137. The next prime is 125765147. The reversal of 125765139 is 931567521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 125765139 - 2¹ = 125765137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125765097 and 125765106.

It is not an unprimeable number, because it can be changed into a prime (125765137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20960854 + ... + 20960859.

It is an arithmetic number, because the mean of its divisors is an integer number (41921714).

Almost surely, 2^125765139 is an apocalyptic number.

125765139 is a deficient number, since it is larger than the sum of its proper divisors (41921717).

125765139 is an equidigital number, since it uses as much as digits as its factorization.

125765139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41921716.

The product of its digits is 56700, while the sum is 39.

The square root of 125765139 is about 11214.5057403347. The cubic root of 125765139 is about 501.0181108269.

The spelling of 125765139 in words is "one hundred twenty-five million, seven hundred sixty-five thousand, one hundred thirty-nine".