57641921 has 4 divisors (see below), whose sum is σ = 57659844. Its totient is φ = 57624000.

The previous prime is 57641911. The next prime is 57641939. The reversal of 57641921 is 12914675.

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 7075600 + 50566321 = 2660^2 + 7111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57641921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57641911) 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, 2660 + ... + 11061.

It is an arithmetic number, because the mean of its divisors is an integer number (14414961).

Almost surely, 2^57641921 is an apocalyptic number.

It is an amenable number.

57641921 is a deficient number, since it is larger than the sum of its proper divisors (17923).

57641921 is a wasteful number, since it uses less digits than its factorization.

57641921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17922.

The product of its digits is 15120, while the sum is 35.

The square root of 57641921 is about 7592.2276704535. The cubic root of 57641921 is about 386.2894215864.

The spelling of 57641921 in words is "fifty-seven million, six hundred forty-one thousand, nine hundred twenty-one".