421004331 has 16 divisors (see below), whose sum is σ = 680411520. Its totient is φ = 255153960.

The previous prime is 421004329. The next prime is 421004377. The reversal of 421004331 is 133400124.

It is not a de Polignac number, because 421004331 - 2¹ = 421004329 is a prime.

It is a super-2 number, since 2×421004331² = 354489293441515122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421004321) 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, 708465 + ... + 709058.

It is an arithmetic number, because the mean of its divisors is an integer number (42525720).

Almost surely, 2^421004331 is an apocalyptic number.

421004331 is a deficient number, since it is larger than the sum of its proper divisors (259407189).

421004331 is a wasteful number, since it uses less digits than its factorization.

421004331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417543 (or 1417537 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 421004331 is about 20518.3900684240. The cubic root of 421004331 is about 749.4836926505.

Adding to 421004331 its reverse (133400124), we get a palindrome (554404455).

The spelling of 421004331 in words is "four hundred twenty-one million, four thousand, three hundred thirty-one".