421590490 has 36 divisors (see below), whose sum is σ = 782100522. Its totient is φ = 163623600.

The previous prime is 421590479. The next prime is 421590523. The reversal of 421590490 is 94095124.

It can be written as a sum of positive squares in only one way, i.e., 379431441 + 42159049 = 19479^2 + 6493^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2791915 + ... + 2792065.

Almost surely, 2^421590490 is an apocalyptic number.

421590490 is a deficient number, since it is larger than the sum of its proper divisors (360510032).

421590490 is an equidigital number, since it uses as much as digits as its factorization.

421590490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 421590490 is about 20532.6688474733. The cubic root of 421590490 is about 749.8313635667.

Multiplying 421590490 by its product of nonzero digits (12960), we get a square (5463812750400 = 2337480²).

The spelling of 421590490 in words is "four hundred twenty-one million, five hundred ninety thousand, four hundred ninety".