2645091 has 6 divisors (see below), whose sum is σ = 3820700. Its totient is φ = 1763388.

The previous prime is 2645087. The next prime is 2645099. The reversal of 2645091 is 1905462.

It is not a de Polignac number, because 2645091 - 2² = 2645087 is a prime.

It is a Duffinian number.

2645091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2645099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146941 + ... + 146958.

2^2645091 is an apocalyptic number.

2645091 is a deficient number, since it is larger than the sum of its proper divisors (1175609).

2645091 is a wasteful number, since it uses less digits than its factorization.

2645091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293905 (or 293902 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2645091 is about 1626.3735733219. The cubic root of 2645091 is about 138.2972483740.

The spelling of 2645091 in words is "two million, six hundred forty-five thousand, ninety-one".