125138739 has 16 divisors (see below), whose sum is σ = 182513664. Its totient is φ = 75636000.

The previous prime is 125138737. The next prime is 125138749. The reversal of 125138739 is 937831521.

It is not a de Polignac number, because 125138739 - 2¹ = 125138737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125138697 and 125138706.

It is not an unprimeable number, because it can be changed into a prime (125138737) 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, 7689 + ... + 17589.

It is an arithmetic number, because the mean of its divisors is an integer number (11407104).

Almost surely, 2^125138739 is an apocalyptic number.

125138739 is a deficient number, since it is larger than the sum of its proper divisors (57374925).

125138739 is a wasteful number, since it uses less digits than its factorization.

125138739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298.

The product of its digits is 45360, while the sum is 39.

The square root of 125138739 is about 11186.5427635172. The cubic root of 125138739 is about 500.1849169364.

The spelling of 125138739 in words is "one hundred twenty-five million, one hundred thirty-eight thousand, seven hundred thirty-nine".