72122499 has 24 divisors (see below), whose sum is σ = 110011200. Its totient is φ = 45405360.

The previous prime is 72122471. The next prime is 72122521. The reversal of 72122499 is 99422127.

It is a de Polignac number, because none of the positive numbers 2^k-72122499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72122459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83532 + ... + 84390.

It is an arithmetic number, because the mean of its divisors is an integer number (4583800).

Almost surely, 2^72122499 is an apocalyptic number.

72122499 is a deficient number, since it is larger than the sum of its proper divisors (37888701).

72122499 is a wasteful number, since it uses less digits than its factorization.

72122499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375 (or 1372 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 72122499 is about 8492.4966293782. The cubic root of 72122499 is about 416.2525644405.

It can be divided in two parts, 721 and 22499, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 72122499 in words is "seventy-two million, one hundred twenty-two thousand, four hundred ninety-nine".