72539501 has 8 divisors (see below), whose sum is σ = 73419840. Its totient is φ = 71662752.

The previous prime is 72539491. The next prime is 72539503. The reversal of 72539501 is 10593527.

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

It is a cyclic number.

It is not a de Polignac number, because 72539501 - 2⁶ = 72539437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72539503) 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, 75641 + ... + 76593.

It is an arithmetic number, because the mean of its divisors is an integer number (9177480).

Almost surely, 2^72539501 is an apocalyptic number.

It is an amenable number.

72539501 is a deficient number, since it is larger than the sum of its proper divisors (880339).

72539501 is a wasteful number, since it uses less digits than its factorization.

72539501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 72539501 is about 8517.0124456877. The cubic root of 72539501 is about 417.0532608946.

The spelling of 72539501 in words is "seventy-two million, five hundred thirty-nine thousand, five hundred one".