2540811 has 32 divisors (see below), whose sum is σ = 4290048. Its totient is φ = 1301760.

The previous prime is 2540789. The next prime is 2540821. The reversal of 2540811 is 1180452.

It is not a de Polignac number, because 2540811 - 2¹⁵ = 2508043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11080 + ... + 11306.

It is an arithmetic number, because the mean of its divisors is an integer number (134064).

2^2540811 is an apocalyptic number.

2540811 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2540811 is a deficient number, since it is larger than the sum of its proper divisors (1749237).

2540811 is a wasteful number, since it uses less digits than its factorization.

2540811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 2540811 is about 1593.9921580736. The cubic root of 2540811 is about 136.4554188968.

The spelling of 2540811 in words is "two million, five hundred forty thousand, eight hundred eleven".