2540881 has 4 divisors (see below), whose sum is σ = 2903872. Its totient is φ = 2177892.

The previous prime is 2540869. The next prime is 2540887. The reversal of 2540881 is 1880452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2540881 - 2⁵ = 2540849 is a prime.

It is a super-2 number, since 2×2540881² = 12912152512322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181485 + ... + 181498.

It is an arithmetic number, because the mean of its divisors is an integer number (725968).

2^2540881 is an apocalyptic number.

It is an amenable number.

2540881 is a deficient number, since it is larger than the sum of its proper divisors (362991).

2540881 is an equidigital number, since it uses as much as digits as its factorization.

2540881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362990.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 2540881 is about 1594.0141153704. The cubic root of 2540881 is about 136.4566720126.

The spelling of 2540881 in words is "two million, five hundred forty thousand, eight hundred eighty-one".