72125816 has 16 divisors (see below), whose sum is σ = 154555440. Its totient is φ = 30911040.

The previous prime is 72125803. The next prime is 72125819. The reversal of 72125816 is 61852127.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72125819) 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, 643925 + ... + 644036.

It is an arithmetic number, because the mean of its divisors is an integer number (9659715).

Almost surely, 2^72125816 is an apocalyptic number.

It is an amenable number.

72125816 is an abundant number, since it is smaller than the sum of its proper divisors (82429624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72125816 is a wasteful number, since it uses less digits than its factorization.

72125816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287974 (or 1287970 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 72125816 is about 8492.6919171721. The cubic root of 72125816 is about 416.2589456605.

The spelling of 72125816 in words is "seventy-two million, one hundred twenty-five thousand, eight hundred sixteen".