72915123 has 16 divisors (see below), whose sum is σ = 100105376. Its totient is φ = 47174400.

The previous prime is 72915109. The next prime is 72915133. The reversal of 72915123 is 32151927.

It is not a de Polignac number, because 72915123 - 2¹⁰ = 72914099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72915133) 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, 66165 + ... + 67257.

It is an arithmetic number, because the mean of its divisors is an integer number (6256586).

Almost surely, 2^72915123 is an apocalyptic number.

72915123 is a deficient number, since it is larger than the sum of its proper divisors (27190253).

72915123 is a wasteful number, since it uses less digits than its factorization.

72915123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734.

The product of its digits is 3780, while the sum is 30.

The square root of 72915123 is about 8539.0352499565. The cubic root of 72915123 is about 417.7718797554.

It can be divided in two parts, 72 and 915123, that multiplied together give a palindrome (65888856).

The spelling of 72915123 in words is "seventy-two million, nine hundred fifteen thousand, one hundred twenty-three".