455986021 has 2 divisors, whose sum is σ = 455986022. Its totient is φ = 455986020.

The previous prime is 455986009. The next prime is 455986049. The reversal of 455986021 is 120689554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455609025 + 376996 = 21345^2 + 614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-455986021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (455986001) 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, 227993010 + 227993011.

It is an arithmetic number, because the mean of its divisors is an integer number (227993011).

Almost surely, 2^455986021 is an apocalyptic number.

It is an amenable number.

455986021 is a deficient number, since it is larger than the sum of its proper divisors (1).

455986021 is an equidigital number, since it uses as much as digits as its factorization.

455986021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 455986021 is about 21353.8291882276. The cubic root of 455986021 is about 769.6923609415.

The spelling of 455986021 in words is "four hundred fifty-five million, nine hundred eighty-six thousand, twenty-one".