72534205 has 4 divisors (see below), whose sum is σ = 87041052. Its totient is φ = 58027360.

The previous prime is 72534197. The next prime is 72534221. The reversal of 72534205 is 50243527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19695844 + 52838361 = 4438^2 + 7269^2 .

It is not a de Polignac number, because 72534205 - 2³ = 72534197 is a prime.

It is a super-2 number, since 2×72534205² = 10522421789964050, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 7253416 + ... + 7253425.

It is an arithmetic number, because the mean of its divisors is an integer number (21760263).

Almost surely, 2^72534205 is an apocalyptic number.

It is an amenable number.

72534205 is a deficient number, since it is larger than the sum of its proper divisors (14506847).

72534205 is a wasteful number, since it uses less digits than its factorization.

72534205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14506846.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 72534205 is about 8516.7015328706. The cubic root of 72534205 is about 417.0431111702.

The spelling of 72534205 in words is "seventy-two million, five hundred thirty-four thousand, two hundred five".