72507545 has 16 divisors (see below), whose sum is σ = 95090112. Its totient is φ = 52637760.

The previous prime is 72507527. The next prime is 72507577. The reversal of 72507545 is 54570527.

It is a happy number.

It is not a de Polignac number, because 72507545 - 2⁸ = 72507289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47819 + ... + 49311.

It is an arithmetic number, because the mean of its divisors is an integer number (5943132).

Almost surely, 2^72507545 is an apocalyptic number.

It is an amenable number.

72507545 is a deficient number, since it is larger than the sum of its proper divisors (22582567).

72507545 is a wasteful number, since it uses less digits than its factorization.

72507545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392.

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 72507545 is about 8515.1362290923. The cubic root of 72507545 is about 416.9920100757.

The spelling of 72507545 in words is "seventy-two million, five hundred seven thousand, five hundred forty-five".