72577121 has 8 divisors (see below), whose sum is σ = 76071744. Its totient is φ = 69110800.

The previous prime is 72577117. The next prime is 72577157. The reversal of 72577121 is 12177527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72577121 - 2² = 72577117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72577171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730 + ... + 12171.

It is an arithmetic number, because the mean of its divisors is an integer number (9508968).

Almost surely, 2^72577121 is an apocalyptic number.

It is an amenable number.

72577121 is a deficient number, since it is larger than the sum of its proper divisors (3494623).

72577121 is a wasteful number, since it uses less digits than its factorization.

72577121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14151.

The product of its digits is 6860, while the sum is 32.

The square root of 72577121 is about 8519.2206803205. The cubic root of 72577121 is about 417.1253449866.

The spelling of 72577121 in words is "seventy-two million, five hundred seventy-seven thousand, one hundred twenty-one".