72571005 has 32 divisors (see below), whose sum is σ = 138942720. Its totient is φ = 35726400.

The previous prime is 72570959. The next prime is 72571007. The reversal of 72571005 is 50017527.

It is not a de Polignac number, because 72571005 - 2⁸ = 72570749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 72571005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72571007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18921 + ... + 22430.

It is an arithmetic number, because the mean of its divisors is an integer number (4341960).

Almost surely, 2^72571005 is an apocalyptic number.

It is an amenable number.

72571005 is a deficient number, since it is larger than the sum of its proper divisors (66371715).

72571005 is a wasteful number, since it uses less digits than its factorization.

72571005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41378 (or 41372 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 72571005 is about 8518.8617197370. The cubic root of 72571005 is about 417.1136277482.

The spelling of 72571005 in words is "seventy-two million, five hundred seventy-one thousand, five".