451042421 has 2 divisors, whose sum is σ = 451042422. Its totient is φ = 451042420.

The previous prime is 451042411. The next prime is 451042429. The reversal of 451042421 is 124240154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399000625 + 52041796 = 19975^2 + 7214^2 .

It is a cyclic number.

It is not a de Polignac number, because 451042421 - 2¹⁰ = 451041397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451042429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225521210 + 225521211.

It is an arithmetic number, because the mean of its divisors is an integer number (225521211).

Almost surely, 2^451042421 is an apocalyptic number.

It is an amenable number.

451042421 is a deficient number, since it is larger than the sum of its proper divisors (1).

451042421 is an equidigital number, since it uses as much as digits as its factorization.

451042421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 451042421 is about 21237.7593215480. The cubic root of 451042421 is about 766.9006924083.

Adding to 451042421 its reverse (124240154), we get a palindrome (575282575).

The spelling of 451042421 in words is "four hundred fifty-one million, forty-two thousand, four hundred twenty-one".