72465641 has 4 divisors (see below), whose sum is σ = 72735300. Its totient is φ = 72195984.

The previous prime is 72465637. The next prime is 72465649. The reversal of 72465641 is 14656427.

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 19175641 + 53290000 = 4379^2 + 7300^2 .

It is a cyclic number.

It is not a de Polignac number, because 72465641 - 2² = 72465637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72465649) 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, 134426 + ... + 134963.

It is an arithmetic number, because the mean of its divisors is an integer number (18183825).

Almost surely, 2^72465641 is an apocalyptic number.

It is an amenable number.

72465641 is a deficient number, since it is larger than the sum of its proper divisors (269659).

72465641 is a wasteful number, since it uses less digits than its factorization.

72465641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269658.

The product of its digits is 40320, while the sum is 35.

The square root of 72465641 is about 8512.6753139069. The cubic root of 72465641 is about 416.9116644122.

The spelling of 72465641 in words is "seventy-two million, four hundred sixty-five thousand, six hundred forty-one".