2605881 has 12 divisors (see below), whose sum is σ = 3544368. Its totient is φ = 1702944.

The previous prime is 2605871. The next prime is 2605909. The reversal of 2605881 is 1885062.

It is not a de Polignac number, because 2605881 - 2⁵ = 2605849 is a prime.

It is a super-2 number, since 2×2605881² = 13581231572322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2605871) 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, 15906 + ... + 16068.

It is an arithmetic number, because the mean of its divisors is an integer number (295364).

2^2605881 is an apocalyptic number.

It is an amenable number.

2605881 is a deficient number, since it is larger than the sum of its proper divisors (938487).

2605881 is an equidigital number, since it uses as much as digits as its factorization.

2605881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 2605881 is about 1614.2741402872. The cubic root of 2605881 is about 137.6104853027.

It can be divided in two parts, 2605 and 881, that added together give a triangular number (3486 = T₈₃).

The spelling of 2605881 in words is "two million, six hundred five thousand, eight hundred eighty-one".