72261507 has 4 divisors (see below), whose sum is σ = 96348680. Its totient is φ = 48174336.

The previous prime is 72261493. The next prime is 72261517. The reversal of 72261507 is 70516227.

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

It is not a de Polignac number, because 72261507 - 2¹⁰ = 72260483 is a prime.

It is a super-2 number, since 2×72261507² = 10443450787822098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72261517) 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, 12043582 + ... + 12043587.

It is an arithmetic number, because the mean of its divisors is an integer number (24087170).

Almost surely, 2^72261507 is an apocalyptic number.

72261507 is a deficient number, since it is larger than the sum of its proper divisors (24087173).

72261507 is a wasteful number, since it uses less digits than its factorization.

72261507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24087172.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 72261507 is about 8500.6768554039. The cubic root of 72261507 is about 416.5198194700.

The spelling of 72261507 in words is "seventy-two million, two hundred sixty-one thousand, five hundred seven".