72145899 has 12 divisors (see below), whose sum is σ = 119098096. Its totient is φ = 41226192.

The previous prime is 72145889. The next prime is 72145903. The reversal of 72145899 is 99854127.

It is not a de Polignac number, because 72145899 - 2⁴ = 72145883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72145889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 572524 + ... + 572649.

Almost surely, 2^72145899 is an apocalyptic number.

72145899 is a deficient number, since it is larger than the sum of its proper divisors (46952197).

72145899 is a wasteful number, since it uses less digits than its factorization.

72145899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145186 (or 1145183 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 72145899 is about 8493.8742043899. The cubic root of 72145899 is about 416.2975770091.

The spelling of 72145899 in words is "seventy-two million, one hundred forty-five thousand, eight hundred ninety-nine".