455940421 has 2 divisors, whose sum is σ = 455940422. Its totient is φ = 455940420.

The previous prime is 455940389. The next prime is 455940479. The reversal of 455940421 is 124049554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426629025 + 29311396 = 20655^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 455940421 - 2⁵ = 455940389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (455944421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227970210 + 227970211.

It is an arithmetic number, because the mean of its divisors is an integer number (227970211).

Almost surely, 2^455940421 is an apocalyptic number.

It is an amenable number.

455940421 is a deficient number, since it is larger than the sum of its proper divisors (1).

455940421 is an equidigital number, since it uses as much as digits as its factorization.

455940421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 455940421 is about 21352.7614373411. The cubic root of 455940421 is about 769.6667028876. Note that the first 3 decimals are identical.

Adding to 455940421 its reverse (124049554), we get a palindrome (579989975).

The spelling of 455940421 in words is "four hundred fifty-five million, nine hundred forty thousand, four hundred twenty-one".