72742563 has 8 divisors (see below), whose sum is σ = 107766800. Its totient is φ = 48495024.

The previous prime is 72742547. The next prime is 72742577. The reversal of 72742563 is 36524727.

It is a happy number.

It is not a de Polignac number, because 72742563 - 2⁴ = 72742547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72742513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1347058 + ... + 1347111.

It is an arithmetic number, because the mean of its divisors is an integer number (13470850).

Almost surely, 2^72742563 is an apocalyptic number.

72742563 is a deficient number, since it is larger than the sum of its proper divisors (35024237).

72742563 is a wasteful number, since it uses less digits than its factorization.

72742563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694178 (or 2694172 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 72742563 is about 8528.9250788127. The cubic root of 72742563 is about 417.4420548981.

The spelling of 72742563 in words is "seventy-two million, seven hundred forty-two thousand, five hundred sixty-three".