2156726 has 16 divisors (see below), whose sum is σ = 3801168. Its totient is φ = 904800.

The previous prime is 2156719. The next prime is 2156731. The reversal of 2156726 is 6276512.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3485 + ... + 4056.

It is an arithmetic number, because the mean of its divisors is an integer number (237573).

2^2156726 is an apocalyptic number.

2156726 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2156726 is a deficient number, since it is larger than the sum of its proper divisors (1644442).

2156726 is a wasteful number, since it uses less digits than its factorization.

2156726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7567.

The product of its digits is 5040, while the sum is 29.

The square root of 2156726 is about 1468.5795858584. The cubic root of 2156726 is about 129.2007370871.

It can be divided in two parts, 2156 and 726, that added together give a palindrome (2882).

The spelling of 2156726 in words is "two million, one hundred fifty-six thousand, seven hundred twenty-six".