125904639 has 16 divisors (see below), whose sum is σ = 192045312. Its totient is φ = 71874048.

The previous prime is 125904637. The next prime is 125904641. The reversal of 125904639 is 936409521.

It is an interprime number because it is at equal distance from previous prime (125904637) and next prime (125904641).

It is not a de Polignac number, because 125904639 - 2¹ = 125904637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125904597 and 125904606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125904637) 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, 24607 + ... + 29279.

It is an arithmetic number, because the mean of its divisors is an integer number (12002832).

Almost surely, 2^125904639 is an apocalyptic number.

125904639 is a deficient number, since it is larger than the sum of its proper divisors (66140673).

125904639 is a wasteful number, since it uses less digits than its factorization.

125904639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 125904639 is about 11220.7236397658. The cubic root of 125904639 is about 501.2032872101.

The spelling of 125904639 in words is "one hundred twenty-five million, nine hundred four thousand, six hundred thirty-nine".