72545571 has 16 divisors (see below), whose sum is σ = 122828800. Its totient is φ = 41454504.

The previous prime is 72545563. The next prime is 72545587. The reversal of 72545571 is 17554527.

It is not a de Polignac number, because 72545571 - 2³ = 72545563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72545521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191731 + ... + 192108.

It is an arithmetic number, because the mean of its divisors is an integer number (7676800).

Almost surely, 2^72545571 is an apocalyptic number.

72545571 is a deficient number, since it is larger than the sum of its proper divisors (50283229).

72545571 is a wasteful number, since it uses less digits than its factorization.

72545571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383855 (or 383849 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 72545571 is about 8517.3687838440. The cubic root of 72545571 is about 417.0648933737.

The spelling of 72545571 in words is "seventy-two million, five hundred forty-five thousand, five hundred seventy-one".