3151972 has 6 divisors (see below), whose sum is σ = 5515958. Its totient is φ = 1575984.

The previous prime is 3151927. The next prime is 3151979. The reversal of 3151972 is 2791513.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 1498176 = 1286^2 + 1224^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3151972.

It is not an unprimeable number, because it can be changed into a prime (3151979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393993 + ... + 394000.

Almost surely, 2^3151972 is an apocalyptic number.

It is an amenable number.

3151972 is a deficient number, since it is larger than the sum of its proper divisors (2363986).

3151972 is a wasteful number, since it uses less digits than its factorization.

3151972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787997 (or 787995 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 3151972 is about 1775.3793960729. The cubic root of 3151972 is about 146.6203044463.

It can be divided in two parts, 31 and 51972, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 3151972 in words is "three million, one hundred fifty-one thousand, nine hundred seventy-two".