72004559 has 12 divisors (see below), whose sum is σ = 82589808. Its totient is φ = 62610240.

The previous prime is 72004549. The next prime is 72004561. The reversal of 72004559 is 95540027.

It is not a de Polignac number, because 72004559 - 2²⁴ = 55227343 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72004549) 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, 10154 + ... + 15719.

It is an arithmetic number, because the mean of its divisors is an integer number (6882484).

Almost surely, 2^72004559 is an apocalyptic number.

72004559 is a deficient number, since it is larger than the sum of its proper divisors (10585249).

72004559 is a wasteful number, since it uses less digits than its factorization.

72004559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25918 (or 25907 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 72004559 is about 8485.5500116374. The cubic root of 72004559 is about 416.0255450752.

The spelling of 72004559 in words is "seventy-two million, four thousand, five hundred fifty-nine".