125555139 has 6 divisors (see below), whose sum is σ = 181357436. Its totient is φ = 83703420.

The previous prime is 125555117. The next prime is 125555147. The reversal of 125555139 is 931555521.

It is not a de Polignac number, because 125555139 - 2⁷ = 125555011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125555159) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6975277 + ... + 6975294.

Almost surely, 2^125555139 is an apocalyptic number.

125555139 is a deficient number, since it is larger than the sum of its proper divisors (55802297).

125555139 is a wasteful number, since it uses less digits than its factorization.

125555139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13950577 (or 13950574 counting only the distinct ones).

The product of its digits is 33750, while the sum is 36.

The square root of 125555139 is about 11205.1389549617. The cubic root of 125555139 is about 500.7390922802.

The spelling of 125555139 in words is "one hundred twenty-five million, five hundred fifty-five thousand, one hundred thirty-nine".