421421004 has 36 divisors (see below), whose sum is σ = 1066324896. Its totient is φ = 140333088.

The previous prime is 421420903. The next prime is 421421017. The reversal of 421421004 is 400124124.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×421421004² = 355191325224736032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34402 + ... + 45014.

It is an arithmetic number, because the mean of its divisors is an integer number (29620136).

Almost surely, 2^421421004 is an apocalyptic number.

It is an amenable number.

421421004 is an abundant number, since it is smaller than the sum of its proper divisors (644903892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421421004 is a wasteful number, since it uses less digits than its factorization.

421421004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11726 (or 11721 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421421004 is about 20528.5412048689. The cubic root of 421421004 is about 749.7308687694.

Adding to 421421004 its reverse (400124124), we get a palindrome (821545128).

The spelling of 421421004 in words is "four hundred twenty-one million, four hundred twenty-one thousand, four".