2599891 has 12 divisors (see below), whose sum is σ = 3061128. Its totient is φ = 2201472.

The previous prime is 2599889. The next prime is 2599907. The reversal of 2599891 is 1989952.

It is not a de Polignac number, because 2599891 - 2¹ = 2599889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2599871) 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, 4480 + ... + 5026.

It is an arithmetic number, because the mean of its divisors is an integer number (255094).

2^2599891 is an apocalyptic number.

2599891 is a deficient number, since it is larger than the sum of its proper divisors (461237).

2599891 is an equidigital number, since it uses as much as digits as its factorization.

2599891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 651 counting only the distinct ones).

The product of its digits is 58320, while the sum is 43.

The square root of 2599891 is about 1612.4177498403. The cubic root of 2599891 is about 137.5049651100.

The spelling of 2599891 in words is "two million, five hundred ninety-nine thousand, eight hundred ninety-one".