72534501 has 16 divisors (see below), whose sum is σ = 115725120. Its totient is φ = 44636400.

The previous prime is 72534487. The next prime is 72534503. The reversal of 72534501 is 10543527.

It is a happy number.

It is not a de Polignac number, because 72534501 - 2¹³ = 72526309 is a prime.

It is a super-2 number, since 2×72534501² = 10522507670638002, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72534503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 102975 + ... + 103676.

It is an arithmetic number, because the mean of its divisors is an integer number (7232820).

Almost surely, 2^72534501 is an apocalyptic number.

It is an amenable number.

72534501 is a deficient number, since it is larger than the sum of its proper divisors (43190619).

72534501 is a wasteful number, since it uses less digits than its factorization.

72534501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206673 (or 206667 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 72534501 is about 8516.7189104725. The cubic root of 72534501 is about 417.0436784639.

The spelling of 72534501 in words is "seventy-two million, five hundred thirty-four thousand, five hundred one".