2158256 has 20 divisors (see below), whose sum is σ = 4280232. Its totient is φ = 1053696.

The previous prime is 2158237. The next prime is 2158259. The reversal of 2158256 is 6528512.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2158259) 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, 881 + ... + 2256.

2^2158256 is an apocalyptic number.

It is an amenable number.

2158256 is a deficient number, since it is larger than the sum of its proper divisors (2121976).

2158256 is a wasteful number, since it uses less digits than its factorization.

2158256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188 (or 3182 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2158256 is about 1469.1004050098. The cubic root of 2158256 is about 129.2312819039.

The spelling of 2158256 in words is "two million, one hundred fifty-eight thousand, two hundred fifty-six".