2156872 has 16 divisors (see below), whose sum is σ = 4060800. Its totient is φ = 1074000.

The previous prime is 2156867. The next prime is 2156873. The reversal of 2156872 is 2786512.

It is not an unprimeable number, because it can be changed into a prime (2156873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2497 + ... + 3247.

It is an arithmetic number, because the mean of its divisors is an integer number (253800).

2^2156872 is an apocalyptic number.

It is an amenable number.

2156872 is a deficient number, since it is larger than the sum of its proper divisors (1903928).

2156872 is a wasteful number, since it uses less digits than its factorization.

2156872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1112 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 2156872 is about 1468.6292929123. The cubic root of 2156872 is about 129.2036524446.

The spelling of 2156872 in words is "two million, one hundred fifty-six thousand, eight hundred seventy-two".