3131120 has 20 divisors (see below), whose sum is σ = 7280040. Its totient is φ = 1252416.

The previous prime is 3131113. The next prime is 3131123. The reversal of 3131120 is 211313.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19490 + ... + 19649.

It is an arithmetic number, because the mean of its divisors is an integer number (364002).

Almost surely, 2^3131120 is an apocalyptic number.

It is an amenable number.

3131120 is an abundant number, since it is smaller than the sum of its proper divisors (4148920).

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

3131120 is a wasteful number, since it uses less digits than its factorization.

3131120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39152 (or 39146 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 3131120 is about 1769.4971036992. The cubic root of 3131120 is about 146.2962646141.

Adding to 3131120 its reverse (211313), we get a palindrome (3342433).

The spelling of 3131120 in words is "three million, one hundred thirty-one thousand, one hundred twenty".