125139839 has 16 divisors (see below), whose sum is σ = 149216256. Its totient is φ = 103612800.

The previous prime is 125139829. The next prime is 125139851. The reversal of 125139839 is 938931521.

It is a cyclic number.

It is not a de Polignac number, because 125139839 - 2⁸ = 125139583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125139796 and 125139805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125139829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4997 + ... + 16590.

It is an arithmetic number, because the mean of its divisors is an integer number (9326016).

Almost surely, 2^125139839 is an apocalyptic number.

125139839 is a deficient number, since it is larger than the sum of its proper divisors (24076417).

125139839 is a wasteful number, since it uses less digits than its factorization.

125139839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21646.

The product of its digits is 58320, while the sum is 41.

The square root of 125139839 is about 11186.5919296272. The cubic root of 125139839 is about 500.1863825145.

The spelling of 125139839 in words is "one hundred twenty-five million, one hundred thirty-nine thousand, eight hundred thirty-nine".