321004140 has 48 divisors (see below), whose sum is σ = 899815392. Its totient is φ = 85505536.

The previous prime is 321004139. The next prime is 321004153. The reversal of 321004140 is 41400123.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63382 + ... + 68258.

It is an arithmetic number, because the mean of its divisors is an integer number (18746154).

Almost surely, 2^321004140 is an apocalyptic number.

321004140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321004140 is an abundant number, since it is smaller than the sum of its proper divisors (578811252).

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

321004140 is a wasteful number, since it uses less digits than its factorization.

321004140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5986 (or 5984 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 321004140 is about 17916.5884029298. The cubic root of 321004140 is about 684.7050713238.

Adding to 321004140 its reverse (41400123), we get a palindrome (362404263).

The spelling of 321004140 in words is "three hundred twenty-one million, four thousand, one hundred forty".