456910021 has 2 divisors, whose sum is σ = 456910022. Its totient is φ = 456910020.

The previous prime is 456910007. The next prime is 456910031. The reversal of 456910021 is 120019654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397404225 + 59505796 = 19935^2 + 7714^2 .

It is a cyclic number.

It is not a de Polignac number, because 456910021 - 2⁵ = 456909989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (456910031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228455010 + 228455011.

It is an arithmetic number, because the mean of its divisors is an integer number (228455011).

Almost surely, 2^456910021 is an apocalyptic number.

It is an amenable number.

456910021 is a deficient number, since it is larger than the sum of its proper divisors (1).

456910021 is an equidigital number, since it uses as much as digits as its factorization.

456910021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 456910021 is about 21375.4537027872. The cubic root of 456910021 is about 770.2119060335.

Adding to 456910021 its reverse (120019654), we get a palindrome (576929675).

The spelling of 456910021 in words is "four hundred fifty-six million, nine hundred ten thousand, twenty-one".