72612065 has 4 divisors (see below), whose sum is σ = 87134484. Its totient is φ = 58089648.

The previous prime is 72612047. The next prime is 72612073. The reversal of 72612065 is 56021627.

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 26697889 + 45914176 = 5167^2 + 6776^2 .

It is a cyclic number.

It is not a de Polignac number, because 72612065 - 2⁸ = 72611809 is a prime.

It is a super-3 number, since 3×72612065³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7261202 + ... + 7261211.

It is an arithmetic number, because the mean of its divisors is an integer number (21783621).

Almost surely, 2^72612065 is an apocalyptic number.

It is an amenable number.

72612065 is a deficient number, since it is larger than the sum of its proper divisors (14522419).

72612065 is a wasteful number, since it uses less digits than its factorization.

72612065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14522418.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 72612065 is about 8521.2713253364. The cubic root of 72612065 is about 417.1922792544.

The spelling of 72612065 in words is "seventy-two million, six hundred twelve thousand, sixty-five".