451494421 has 4 divisors (see below), whose sum is σ = 515993632. Its totient is φ = 386995212.

The previous prime is 451494409. The next prime is 451494427. The reversal of 451494421 is 124494154.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 451494421 - 2¹⁵ = 451461653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451494427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32249595 + ... + 32249608.

It is an arithmetic number, because the mean of its divisors is an integer number (128998408).

Almost surely, 2^451494421 is an apocalyptic number.

It is an amenable number.

451494421 is a deficient number, since it is larger than the sum of its proper divisors (64499211).

451494421 is an equidigital number, since it uses as much as digits as its factorization.

451494421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64499210.

The product of its digits is 23040, while the sum is 34.

The square root of 451494421 is about 21248.3980807966. The cubic root of 451494421 is about 767.1567831657.

The spelling of 451494421 in words is "four hundred fifty-one million, four hundred ninety-four thousand, four hundred twenty-one".