72549265 has 4 divisors (see below), whose sum is σ = 87059124. Its totient is φ = 58039408.

The previous prime is 72549263. The next prime is 72549283. The reversal of 72549265 is 56294527.

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 44997264 + 27552001 = 6708^2 + 5249^2 .

It is a cyclic number.

It is not a de Polignac number, because 72549265 - 2¹ = 72549263 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72549263) 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, 7254922 + ... + 7254931.

It is an arithmetic number, because the mean of its divisors is an integer number (21764781).

Almost surely, 2^72549265 is an apocalyptic number.

It is an amenable number.

72549265 is a deficient number, since it is larger than the sum of its proper divisors (14509859).

72549265 is a wasteful number, since it uses less digits than its factorization.

72549265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14509858.

The product of its digits is 151200, while the sum is 40.

The square root of 72549265 is about 8517.5856320908. The cubic root of 72549265 is about 417.0719721958.

The spelling of 72549265 in words is "seventy-two million, five hundred forty-nine thousand, two hundred sixty-five".