72912125 has 32 divisors (see below), whose sum is σ = 106928640. Its totient is φ = 48936000.

The previous prime is 72912121. The next prime is 72912127. The reversal of 72912125 is 52121927.

It is not a de Polignac number, because 72912125 - 2² = 72912121 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72912121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15836 + ... + 19914.

It is an arithmetic number, because the mean of its divisors is an integer number (3341520).

Almost surely, 2^72912125 is an apocalyptic number.

It is an amenable number.

72912125 is a deficient number, since it is larger than the sum of its proper divisors (34016515).

72912125 is a wasteful number, since it uses less digits than its factorization.

72912125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118 (or 4108 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 72912125 is about 8538.8597013887. The cubic root of 72912125 is about 417.7661539324.

It can be divided in two parts, 72912 and 125, that added together give a palindrome (73037).

The spelling of 72912125 in words is "seventy-two million, nine hundred twelve thousand, one hundred twenty-five".