321421478 has 12 divisors (see below), whose sum is σ = 560847852. Its totient is φ = 137752020.

The previous prime is 321421433. The next prime is 321421487. The reversal of 321421478 is 874124123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1639808 + ... + 1640003.

It is an arithmetic number, because the mean of its divisors is an integer number (46737321).

Almost surely, 2^321421478 is an apocalyptic number.

321421478 is a deficient number, since it is larger than the sum of its proper divisors (239426374).

321421478 is a wasteful number, since it uses less digits than its factorization.

321421478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279827 (or 3279820 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 321421478 is about 17928.2313126532. The cubic root of 321421478 is about 685.0016715465.

The spelling of 321421478 in words is "three hundred twenty-one million, four hundred twenty-one thousand, four hundred seventy-eight".