321172140 has 24 divisors (see below), whose sum is σ = 899282160. Its totient is φ = 85645888.

The previous prime is 321172133. The next prime is 321172151. The reversal of 321172140 is 41271123.

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, 2676375 + ... + 2676494.

It is an arithmetic number, because the mean of its divisors is an integer number (37470090).

Almost surely, 2^321172140 is an apocalyptic number.

321172140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321172140 is an abundant number, since it is smaller than the sum of its proper divisors (578110020).

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

321172140 is a wasteful number, since it uses less digits than its factorization.

321172140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352881 (or 5352879 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 321172140 is about 17921.2761822366. The cubic root of 321172140 is about 684.8244990571.

The spelling of 321172140 in words is "three hundred twenty-one million, one hundred seventy-two thousand, one hundred forty".