3121312 has 24 divisors (see below), whose sum is σ = 6211296. Its totient is φ = 1543872.

The previous prime is 3121303. The next prime is 3121333. The reversal of 3121312 is 2131213.

It is a junction number, because it is equal to n+sod(n) for n = 3121292 and 3121301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823 + ... + 3769.

It is an arithmetic number, because the mean of its divisors is an integer number (258804).

Almost surely, 2^3121312 is an apocalyptic number.

3121312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3121312 is a deficient number, since it is larger than the sum of its proper divisors (3089984).

3121312 is a wasteful number, since it uses less digits than its factorization.

3121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060 (or 1052 counting only the distinct ones).

The product of its digits is 36, while the sum is 13.

The square root of 3121312 is about 1766.7235210977. The cubic root of 3121312 is about 146.1433507912.

Adding to 3121312 its reverse (2131213), we get a palindrome (5252525).

Subtracting from 3121312 its reverse (2131213), we obtain a palindrome (990099).

The spelling of 3121312 in words is "three million, one hundred twenty-one thousand, three hundred twelve".