72102475 has 12 divisors (see below), whose sum is σ = 90201816. Its totient is φ = 57169280.

The previous prime is 72102451. The next prime is 72102479. The reversal of 72102475 is 57420127.

It is not a de Polignac number, because 72102475 - 2⁷ = 72102347 is a prime.

It is a super-2 number, since 2×72102475² = 10397533802251250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72102479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9937 + ... + 15586.

It is an arithmetic number, because the mean of its divisors is an integer number (7516818).

Almost surely, 2^72102475 is an apocalyptic number.

72102475 is a deficient number, since it is larger than the sum of its proper divisors (18099341).

72102475 is a wasteful number, since it uses less digits than its factorization.

72102475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25646 (or 25641 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 72102475 is about 8491.3176244915. The cubic root of 72102475 is about 416.2140382619.

The spelling of 72102475 in words is "seventy-two million, one hundred two thousand, four hundred seventy-five".