57430421 has 2 divisors, whose sum is σ = 57430422. Its totient is φ = 57430420.

The previous prime is 57430397. The next prime is 57430427. The reversal of 57430421 is 12403475.

57430421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 970225 = 7514^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 57430421 - 2⁶ = 57430357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57430427) 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 as a sum of consecutive naturals, namely, 28715210 + 28715211.

It is an arithmetic number, because the mean of its divisors is an integer number (28715211).

Almost surely, 2^57430421 is an apocalyptic number.

It is an amenable number.

57430421 is a deficient number, since it is larger than the sum of its proper divisors (1).

57430421 is an equidigital number, since it uses as much as digits as its factorization.

57430421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 57430421 is about 7578.2861518948. The cubic root of 57430421 is about 385.8163842531.

Adding to 57430421 its reverse (12403475), we get a palindrome (69833896).

The spelling of 57430421 in words is "fifty-seven million, four hundred thirty thousand, four hundred twenty-one".