2645791 has 8 divisors (see below), whose sum is σ = 2709504. Its totient is φ = 2583000.

The previous prime is 2645779. The next prime is 2645809. The reversal of 2645791 is 1975462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2645791 - 2⁷ = 2645663 is a prime.

It is a Duffinian number.

2645791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10416 + ... + 10666.

It is an arithmetic number, because the mean of its divisors is an integer number (338688).

2^2645791 is an apocalyptic number.

2645791 is a deficient number, since it is larger than the sum of its proper divisors (63713).

2645791 is a wasteful number, since it uses less digits than its factorization.

2645791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its digits is 15120, while the sum is 34.

The square root of 2645791 is about 1626.5887617957. The cubic root of 2645791 is about 138.3094470136.

The spelling of 2645791 in words is "two million, six hundred forty-five thousand, seven hundred ninety-one".