321421404 has 36 divisors (see below), whose sum is σ = 791544264. Its totient is φ = 101500128.

The previous prime is 321421357. The next prime is 321421421. The reversal of 321421404 is 404124123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32767 + ... + 41430.

Almost surely, 2^321421404 is an apocalyptic number.

It is an amenable number.

321421404 is an abundant number, since it is smaller than the sum of its proper divisors (470122860).

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

321421404 is a wasteful number, since it uses less digits than its factorization.

321421404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74242 (or 74221 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 321421404 is about 17928.2292488689. The cubic root of 321421404 is about 685.0016189778.

Adding to 321421404 its reverse (404124123), we get a palindrome (725545527).

The spelling of 321421404 in words is "three hundred twenty-one million, four hundred twenty-one thousand, four hundred four".