451530421 has 12 divisors (see below), whose sum is σ = 504904480. Its totient is φ = 402598080.

The previous prime is 451530413. The next prime is 451530427. The reversal of 451530421 is 124035154.

It is a happy number.

It is not a de Polignac number, because 451530421 - 2³ = 451530413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451530427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35625 + ... + 46606.

Almost surely, 2^451530421 is an apocalyptic number.

It is an amenable number.

451530421 is a deficient number, since it is larger than the sum of its proper divisors (53374059).

451530421 is a wasteful number, since it uses less digits than its factorization.

451530421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82284 (or 82267 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 451530421 is about 21249.2451865943. The cubic root of 451530421 is about 767.1771724248.

Adding to 451530421 its reverse (124035154), we get a palindrome (575565575).

The spelling of 451530421 in words is "four hundred fifty-one million, five hundred thirty thousand, four hundred twenty-one".