2540807 has 4 divisors (see below), whose sum is σ = 2545176. Its totient is φ = 2536440.

The previous prime is 2540789. The next prime is 2540821. The reversal of 2540807 is 7080452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2540807 - 2⁶ = 2540743 is a prime.

It is a super-2 number, since 2×2540807² = 12911400422498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 1148 + ... + 2529.

It is an arithmetic number, because the mean of its divisors is an integer number (636294).

2^2540807 is an apocalyptic number.

2540807 is a deficient number, since it is larger than the sum of its proper divisors (4369).

2540807 is an equidigital number, since it uses as much as digits as its factorization.

2540807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2540807 is about 1593.9909033617. The cubic root of 2540807 is about 136.4553472894.

The spelling of 2540807 in words is "two million, five hundred forty thousand, eight hundred seven".