5657021 has 2 divisors, whose sum is σ = 5657022. Its totient is φ = 5657020.

The previous prime is 5656999. The next prime is 5657027. The reversal of 5657021 is 1207565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4044121 + 1612900 = 2011^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 5657021 - 2¹⁰ = 5655997 is a prime.

It is a Chen prime.

It is equal to p₃₉₀₈₂₄ and since 5657021 and 390824 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5657027) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828510 + 2828511.

It is an arithmetic number, because the mean of its divisors is an integer number (2828511).

Almost surely, 2^5657021 is an apocalyptic number.

It is an amenable number.

5657021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5657021 is an equidigital number, since it uses as much as digits as its factorization.

5657021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 5657021 is about 2378.4492847231. The cubic root of 5657021 is about 178.1814943815.

The spelling of 5657021 in words is "five million, six hundred fifty-seven thousand, twenty-one".