125638964 has 12 divisors (see below), whose sum is σ = 239856288. Its totient is φ = 57108600.

The previous prime is 125638957. The next prime is 125638969. The reversal of 125638964 is 469836521.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 2855431 = 125638964 / (1 + 2 + 5 + 6 + 3 + 8 + 9 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125638969) 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, 1427672 + ... + 1427759.

It is an arithmetic number, because the mean of its divisors is an integer number (19988024).

Almost surely, 2^125638964 is an apocalyptic number.

It is an amenable number.

125638964 is a deficient number, since it is larger than the sum of its proper divisors (114217324).

125638964 is a wasteful number, since it uses less digits than its factorization.

125638964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855446 (or 2855444 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 125638964 is about 11208.8788020926. The cubic root of 125638964 is about 500.8505044640.

The spelling of 125638964 in words is "one hundred twenty-five million, six hundred thirty-eight thousand, nine hundred sixty-four".