420425321 has 4 divisors (see below), whose sum is σ = 420466644. Its totient is φ = 420384000.

The previous prime is 420425311. The next prime is 420425329. The reversal of 420425321 is 123524024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 285610000 + 134815321 = 16900^2 + 11611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420425321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420425329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6521 + ... + 29721.

It is an arithmetic number, because the mean of its divisors is an integer number (105116661).

Almost surely, 2^420425321 is an apocalyptic number.

It is an amenable number.

420425321 is a deficient number, since it is larger than the sum of its proper divisors (41323).

420425321 is a wasteful number, since it uses less digits than its factorization.

420425321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41322.

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

The square root of 420425321 is about 20504.2756760633. The cubic root of 420425321 is about 749.1399450807.

Adding to 420425321 its reverse (123524024), we get a palindrome (543949345).

The spelling of 420425321 in words is "four hundred twenty million, four hundred twenty-five thousand, three hundred twenty-one".