420430057 has 2 divisors, whose sum is σ = 420430058. Its totient is φ = 420430056.

The previous prime is 420430039. The next prime is 420430067. The reversal of 420430057 is 750034024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415181376 + 5248681 = 20376^2 + 2291^2 .

It is a cyclic number.

It is not a de Polignac number, because 420430057 - 2¹¹ = 420428009 is a prime.

It is a super-2 number, since 2×420430057² = 353522865658046498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420430027) 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, 210215028 + 210215029.

It is an arithmetic number, because the mean of its divisors is an integer number (210215029).

Almost surely, 2^420430057 is an apocalyptic number.

It is an amenable number.

420430057 is a deficient number, since it is larger than the sum of its proper divisors (1).

420430057 is an equidigital number, since it uses as much as digits as its factorization.

420430057 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 25.

The square root of 420430057 is about 20504.3911638459. The cubic root of 420430057 is about 749.1427580364.

The spelling of 420430057 in words is "four hundred twenty million, four hundred thirty thousand, fifty-seven".