72500915 has 16 divisors (see below), whose sum is σ = 90218016. Its totient is φ = 55891200.

The previous prime is 72500893. The next prime is 72500917. The reversal of 72500915 is 51900527.

It is not a de Polignac number, because 72500915 - 2¹⁰ = 72499891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72500917) 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, 14885 + ... + 19145.

It is an arithmetic number, because the mean of its divisors is an integer number (5638626).

Almost surely, 2^72500915 is an apocalyptic number.

72500915 is a deficient number, since it is larger than the sum of its proper divisors (17717101).

72500915 is a wasteful number, since it uses less digits than its factorization.

72500915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 72500915 is about 8514.7469134438. The cubic root of 72500915 is about 416.9792999442.

The spelling of 72500915 in words is "seventy-two million, five hundred thousand, nine hundred fifteen".