2159091 has 24 divisors (see below), whose sum is σ = 3450096. Its totient is φ = 1290240.

The previous prime is 2159083. The next prime is 2159093. The reversal of 2159091 is 1909512.

It is a happy number.

It is not a de Polignac number, because 2159091 - 2³ = 2159083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11091 + ... + 11283.

It is an arithmetic number, because the mean of its divisors is an integer number (143754).

2^2159091 is an apocalyptic number.

2159091 is a deficient number, since it is larger than the sum of its proper divisors (1291005).

2159091 is a wasteful number, since it uses less digits than its factorization.

2159091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 2159091 is about 1469.3845650476. The cubic root of 2159091 is about 129.2479456990.

The spelling of 2159091 in words is "two million, one hundred fifty-nine thousand, ninety-one".