72510861 has 16 divisors (see below), whose sum is σ = 100563200. Its totient is φ = 46433088.

The previous prime is 72510853. The next prime is 72510863. The reversal of 72510861 is 16801527.

It is not a de Polignac number, because 72510861 - 2³ = 72510853 is a prime.

It is a super-2 number, since 2×72510861² = 10515649925922642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72510863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4635 + ... + 12903.

It is an arithmetic number, because the mean of its divisors is an integer number (6285200).

Almost surely, 2^72510861 is an apocalyptic number.

It is an amenable number.

72510861 is a deficient number, since it is larger than the sum of its proper divisors (28052339).

72510861 is a wasteful number, since it uses less digits than its factorization.

72510861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8388.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 72510861 is about 8515.3309389594. The cubic root of 72510861 is about 416.9983667678.

The spelling of 72510861 in words is "seventy-two million, five hundred ten thousand, eight hundred sixty-one".