3121390 has 16 divisors (see below), whose sum is σ = 5800320. Its totient is φ = 1208160.

The previous prime is 3121379. The next prime is 3121409. The reversal of 3121390 is 931213.

It is a congruent 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, 4725 + ... + 5344.

It is an arithmetic number, because the mean of its divisors is an integer number (362520).

Almost surely, 2^3121390 is an apocalyptic number.

3121390 is a deficient number, since it is larger than the sum of its proper divisors (2678930).

3121390 is a wasteful number, since it uses less digits than its factorization.

3121390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10107.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 3121390 is about 1766.7455957211. The cubic root of 3121390 is about 146.1445681304.

The spelling of 3121390 in words is "three million, one hundred twenty-one thousand, three hundred ninety".