2157266 has 16 divisors (see below), whose sum is σ = 3481056. Its totient is φ = 998976.

The previous prime is 2157257. The next prime is 2157269. The reversal of 2157266 is 6627512.

It is not an unprimeable number, because it can be changed into a prime (2157269) 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, 1805 + ... + 2751.

It is an arithmetic number, because the mean of its divisors is an integer number (217566).

2^2157266 is an apocalyptic number.

2157266 is a deficient number, since it is larger than the sum of its proper divisors (1323790).

2157266 is a wasteful number, since it uses less digits than its factorization.

2157266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033.

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

The square root of 2157266 is about 1468.7634254706. The cubic root of 2157266 is about 129.2115192597.

The spelling of 2157266 in words is "two million, one hundred fifty-seven thousand, two hundred sixty-six".