3121872 has 40 divisors (see below), whose sum is σ = 8686944. Its totient is φ = 960384.

The previous prime is 3121841. The next prime is 3121873. The reversal of 3121872 is 2781213.

3121872 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 (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121873) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1878 + ... + 3125.

Almost surely, 2^3121872 is an apocalyptic number.

It is an amenable number.

3121872 is an abundant number, since it is smaller than the sum of its proper divisors (5565072).

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

3121872 is a wasteful number, since it uses less digits than its factorization.

3121872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027 (or 5021 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 3121872 is about 1766.8819994555. The cubic root of 3121872 is about 146.1520902126.

It can be divided in two parts, 3121 and 872, that added together give a palindrome (3993).

The spelling of 3121872 in words is "three million, one hundred twenty-one thousand, eight hundred seventy-two".