321420355 has 8 divisors (see below), whose sum is σ = 392982192. Its totient is φ = 252284448.

The previous prime is 321420349. The next prime is 321420367. The reversal of 321420355 is 553024123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321420355 - 2¹⁹ = 320896067 is a prime.

It is a super-2 number, since 2×321420355² = 206622089216652050, which contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 606189 + ... + 606718.

It is an arithmetic number, because the mean of its divisors is an integer number (49122774).

Almost surely, 2^321420355 is an apocalyptic number.

321420355 is a deficient number, since it is larger than the sum of its proper divisors (71561837).

321420355 is a wasteful number, since it uses less digits than its factorization.

321420355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212965.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 321420355 is about 17928.1999933066. The cubic root of 321420355 is about 685.0008737801. Note that the first 3 decimals are identical.

Adding to 321420355 its reverse (553024123), we get a palindrome (874444478).

The spelling of 321420355 in words is "three hundred twenty-one million, four hundred twenty thousand, three hundred fifty-five".