2540539 has 2 divisors, whose sum is σ = 2540540. Its totient is φ = 2540538.

The previous prime is 2540537. The next prime is 2540563. The reversal of 2540539 is 9350452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2540539 - 2¹ = 2540537 is a prime.

Together with 2540537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2540533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270269 + 1270270.

It is an arithmetic number, because the mean of its divisors is an integer number (1270270).

2^2540539 is an apocalyptic number.

2540539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540539 is an equidigital number, since it uses as much as digits as its factorization.

2540539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2540539 is about 1593.9068354204. The cubic root of 2540539 is about 136.4505494281.

The spelling of 2540539 in words is "two million, five hundred forty thousand, five hundred thirty-nine".