451322420 has 24 divisors (see below), whose sum is σ = 948823848. Its totient is φ = 180329600.

The previous prime is 451322393. The next prime is 451322423. The reversal of 451322420 is 24223154.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 451307536 = 122^2 + 21244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451322423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6830 + ... + 30810.

It is an arithmetic number, because the mean of its divisors is an integer number (39534327).

Almost surely, 2^451322420 is an apocalyptic number.

It is an amenable number.

451322420 is an abundant number, since it is smaller than the sum of its proper divisors (497501428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451322420 is a wasteful number, since it uses less digits than its factorization.

451322420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24931 (or 24929 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 451322420 is about 21244.3503077877. The cubic root of 451322420 is about 767.0593522878.

Adding to 451322420 its reverse (24223154), we get a palindrome (475545574).

The spelling of 451322420 in words is "four hundred fifty-one million, three hundred twenty-two thousand, four hundred twenty".