57104021 has 8 divisors (see below), whose sum is σ = 62997144. Its totient is φ = 51425280.

The previous prime is 57104017. The next prime is 57104027. The reversal of 57104021 is 12040175.

It can be written as a sum of positive squares in 4 ways, for example, as 703921 + 56400100 = 839^2 + 7510^2 .

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 57104021 - 2² = 57104017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57103984 and 57104002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57104027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53036 + ... + 54101.

It is an arithmetic number, because the mean of its divisors is an integer number (7874643).

Almost surely, 2^57104021 is an apocalyptic number.

It is an amenable number.

57104021 is a deficient number, since it is larger than the sum of its proper divisors (5893123).

57104021 is a wasteful number, since it uses less digits than its factorization.

57104021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107191.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 57104021 is about 7556.7202541844. The cubic root of 57104021 is about 385.0840790114.

Adding to 57104021 its reverse (12040175), we get a palindrome (69144196).

The spelling of 57104021 in words is "fifty-seven million, one hundred four thousand, twenty-one".