321721034 has 12 divisors (see below), whose sum is σ = 509318514. Its totient is φ = 152393832.

The previous prime is 321721013. The next prime is 321721051. The reversal of 321721034 is 430127123.

It can be written as a sum of positive squares in only one way, i.e., 316946809 + 4774225 = 17803^2 + 2185^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222077 + ... + 223520.

Almost surely, 2^321721034 is an apocalyptic number.

321721034 is a deficient number, since it is larger than the sum of its proper divisors (187597480).

321721034 is a wasteful number, since it uses less digits than its factorization.

321721034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445637 (or 445618 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 321721034 is about 17936.5836769436. The cubic root of 321721034 is about 685.2144063946.

Adding to 321721034 its reverse (430127123), we get a palindrome (751848157).

The spelling of 321721034 in words is "three hundred twenty-one million, seven hundred twenty-one thousand, thirty-four".