2156072 has 16 divisors (see below), whose sum is σ = 4067700. Its totient is φ = 1071360.

The previous prime is 2156071. The next prime is 2156083. The reversal of 2156072 is 2706512.

It can be written as a sum of positive squares in 2 ways, for example, as 1674436 + 481636 = 1294^2 + 694^2 .

It is not an unprimeable number, because it can be changed into a prime (2156071) 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, 704 + ... + 2192.

2^2156072 is an apocalyptic number.

It is an amenable number.

2156072 is a deficient number, since it is larger than the sum of its proper divisors (1911628).

2156072 is a wasteful number, since it uses less digits than its factorization.

2156072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2156072 is about 1468.3569048430. The cubic root of 2156072 is about 129.1876762680.

The spelling of 2156072 in words is "two million, one hundred fifty-six thousand, seventy-two".