2540479 has 2 divisors, whose sum is σ = 2540480. Its totient is φ = 2540478.

The previous prime is 2540443. The next prime is 2540513. The reversal of 2540479 is 9740452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2540479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270239 + 1270240.

It is an arithmetic number, because the mean of its divisors is an integer number (1270240).

2^2540479 is an apocalyptic number.

2540479 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540479 is an equidigital number, since it uses as much as digits as its factorization.

2540479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2540479 is about 1593.8880136321. Note that the first 3 decimals coincide. The cubic root of 2540479 is about 136.4494752338.

It can be divided in two parts, 25 and 40479, that added together give a palindrome (40504).

The spelling of 2540479 in words is "two million, five hundred forty thousand, four hundred seventy-nine".