72521207 has 16 divisors (see below), whose sum is σ = 81164160. Its totient is φ = 64240800.

The previous prime is 72521173. The next prime is 72521209. The reversal of 72521207 is 70212527.

It is a cyclic number.

It is not a de Polignac number, because 72521207 - 2⁸ = 72520951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72521209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84593 + ... + 85445.

It is an arithmetic number, because the mean of its divisors is an integer number (5072760).

Almost surely, 2^72521207 is an apocalyptic number.

72521207 is a deficient number, since it is larger than the sum of its proper divisors (8642953).

72521207 is a wasteful number, since it uses less digits than its factorization.

72521207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 72521207 is about 8515.9384098289. The cubic root of 72521207 is about 417.0181985552.

The spelling of 72521207 in words is "seventy-two million, five hundred twenty-one thousand, two hundred seven".