2591091 has 12 divisors (see below), whose sum is σ = 3799432. Its totient is φ = 1701216.

The previous prime is 2591059. The next prime is 2591093. The reversal of 2591091 is 1901952.

It is a happy number.

It is not a de Polignac number, because 2591091 - 2⁵ = 2591059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2591093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1546 + ... + 2751.

2^2591091 is an apocalyptic number.

2591091 is a deficient number, since it is larger than the sum of its proper divisors (1208341).

2591091 is a wasteful number, since it uses less digits than its factorization.

2591091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370 (or 4367 counting only the distinct ones).

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

The square root of 2591091 is about 1609.6866154628. The cubic root of 2591091 is about 137.3496494319.

The spelling of 2591091 in words is "two million, five hundred ninety-one thousand, ninety-one".