72865425 has 24 divisors (see below), whose sum is σ = 120931744. Its totient is φ = 38712960.

The previous prime is 72865421. The next prime is 72865433. The reversal of 72865425 is 52456827.

It is not a de Polignac number, because 72865425 - 2² = 72865421 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72865421) 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, 19509 + ... + 22941.

Almost surely, 2^72865425 is an apocalyptic number.

72865425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72865425 is a deficient number, since it is larger than the sum of its proper divisors (48066319).

72865425 is a wasteful number, since it uses less digits than its factorization.

72865425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729 (or 3724 counting only the distinct ones).

The product of its digits is 134400, while the sum is 39.

The square root of 72865425 is about 8536.1247062118. The cubic root of 72865425 is about 417.6769422219.

The spelling of 72865425 in words is "seventy-two million, eight hundred sixty-five thousand, four hundred twenty-five".