72521727 has 16 divisors (see below), whose sum is σ = 102480000. Its totient is φ = 45490464.

The previous prime is 72521723. The next prime is 72521747. The reversal of 72521727 is 72712527.

It is not a de Polignac number, because 72521727 - 2² = 72521723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72521723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4224 + ... + 12762.

It is an arithmetic number, because the mean of its divisors is an integer number (6405000).

Almost surely, 2^72521727 is an apocalyptic number.

72521727 is a deficient number, since it is larger than the sum of its proper divisors (29958273).

72521727 is a wasteful number, since it uses less digits than its factorization.

72521727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8710.

The product of its digits is 13720, while the sum is 33.

The square root of 72521727 is about 8515.9689407606. The cubic root of 72521727 is about 417.0191952703.

The spelling of 72521727 in words is "seventy-two million, five hundred twenty-one thousand, seven hundred twenty-seven".