3121860 has 48 divisors (see below), whose sum is σ = 9991296. Its totient is φ = 713472.

The previous prime is 3121841. The next prime is 3121873. The reversal of 3121860 is 681213.

3121860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 3297 + ... + 4136.

It is an arithmetic number, because the mean of its divisors is an integer number (208152).

Almost surely, 2^3121860 is an apocalyptic number.

3121860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3121860 is an abundant number, since it is smaller than the sum of its proper divisors (6869436).

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

3121860 is a wasteful number, since it uses less digits than its factorization.

3121860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7452 (or 7450 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 3121860 is about 1766.8786036398. The cubic root of 3121860 is about 146.1519029502.

It can be divided in two parts, 31218 and 60, that multiplied together give a triangular number (1873080 = T₁₉₃₅).

The spelling of 3121860 in words is "three million, one hundred twenty-one thousand, eight hundred sixty".