2156272 has 40 divisors (see below), whose sum is σ = 4530960. Its totient is φ = 990720.

The previous prime is 2156269. The next prime is 2156279. The reversal of 2156272 is 2726512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12378 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (113274).

2^2156272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2265480).

2156272 is an abundant number, since it is smaller than the sum of its proper divisors (2374688).

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

2156272 is a wasteful number, since it uses less digits than its factorization.

2156272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 235 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 2156272 is about 1468.4250065972. The cubic root of 2156272 is about 129.1916706826.

The spelling of 2156272 in words is "two million, one hundred fifty-six thousand, two hundred seventy-two".