2540279 has 4 divisors (see below), whose sum is σ = 2903184. Its totient is φ = 2177376.

The previous prime is 2540269. The next prime is 2540323. The reversal of 2540279 is 9720452.

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 2540279 - 2¹⁶ = 2474743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181442 + ... + 181455.

It is an arithmetic number, because the mean of its divisors is an integer number (725796).

2^2540279 is an apocalyptic number.

2540279 is a deficient number, since it is larger than the sum of its proper divisors (362905).

2540279 is an equidigital number, since it uses as much as digits as its factorization.

2540279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362904.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2540279 is about 1593.8252727322. The cubic root of 2540279 is about 136.4458944641.

It can be divided in two parts, 25 and 40279, that added together give a palindrome (40304).

The spelling of 2540279 in words is "two million, five hundred forty thousand, two hundred seventy-nine".