420245321 has 16 divisors (see below), whose sum is σ = 463947264. Its totient is φ = 379002624.

The previous prime is 420245317. The next prime is 420245323. The reversal of 420245321 is 123542024.

It is a happy number.

It is not a de Polignac number, because 420245321 - 2² = 420245317 is a prime.

It is a super-3 number, since 3×420245321³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420245323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33320 + ... + 44166.

It is an arithmetic number, because the mean of its divisors is an integer number (28996704).

Almost surely, 2^420245321 is an apocalyptic number.

It is an amenable number.

420245321 is a deficient number, since it is larger than the sum of its proper divisors (43701943).

420245321 is a wasteful number, since it uses less digits than its factorization.

420245321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10960.

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

The square root of 420245321 is about 20499.8858777311. The cubic root of 420245321 is about 749.0330180934.

Adding to 420245321 its reverse (123542024), we get a palindrome (543787345).

The spelling of 420245321 in words is "four hundred twenty million, two hundred forty-five thousand, three hundred twenty-one".