72261413 has 4 divisors (see below), whose sum is σ = 82584480. Its totient is φ = 61938348.

The previous prime is 72261367. The next prime is 72261433. The reversal of 72261413 is 31416227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31416227 = 53 ⋅592759.

It is a cyclic number.

It is not a de Polignac number, because 72261413 - 2¹⁴ = 72245029 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 (72261433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5161523 + ... + 5161536.

It is an arithmetic number, because the mean of its divisors is an integer number (20646120).

Almost surely, 2^72261413 is an apocalyptic number.

It is an amenable number.

72261413 is a deficient number, since it is larger than the sum of its proper divisors (10323067).

72261413 is a wasteful number, since it uses less digits than its factorization.

72261413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10323066.

The product of its digits is 2016, while the sum is 26.

The square root of 72261413 is about 8500.6713264306. The cubic root of 72261413 is about 416.5196388627.

The spelling of 72261413 in words is "seventy-two million, two hundred sixty-one thousand, four hundred thirteen".