451042643 has 2 divisors, whose sum is σ = 451042644. Its totient is φ = 451042642.

The previous prime is 451042639. The next prime is 451042651. The reversal of 451042643 is 346240154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451042643 - 2² = 451042639 is a prime.

It is not a weakly prime, because it can be changed into another prime (451042663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225521321 + 225521322.

It is an arithmetic number, because the mean of its divisors is an integer number (225521322).

Almost surely, 2^451042643 is an apocalyptic number.

451042643 is a deficient number, since it is larger than the sum of its proper divisors (1).

451042643 is an equidigital number, since it uses as much as digits as its factorization.

451042643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 451042643 is about 21237.7645480874. The cubic root of 451042643 is about 766.9008182294.

Adding to 451042643 its reverse (346240154), we get a palindrome (797282797).

The spelling of 451042643 in words is "four hundred fifty-one million, forty-two thousand, six hundred forty-three".