72542765 has 8 divisors (see below), whose sum is σ = 87399648. Its totient is φ = 57802000.

The previous prime is 72542737. The next prime is 72542773. The reversal of 72542765 is 56724527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72542765 - 2²² = 68348461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27647 + ... + 30156.

It is an arithmetic number, because the mean of its divisors is an integer number (10924956).

Almost surely, 2^72542765 is an apocalyptic number.

It is an amenable number.

72542765 is a deficient number, since it is larger than the sum of its proper divisors (14856883).

72542765 is a wasteful number, since it uses less digits than its factorization.

72542765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58059.

The product of its digits is 117600, while the sum is 38.

The square root of 72542765 is about 8517.2040600188. The cubic root of 72542765 is about 417.0595160678.

The spelling of 72542765 in words is "seventy-two million, five hundred forty-two thousand, seven hundred sixty-five".