2542539 has 8 divisors (see below), whose sum is σ = 3431232. Its totient is φ = 1674440.

The previous prime is 2542531. The next prime is 2542549. The reversal of 2542539 is 9352452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2542539 - 2³ = 2542531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2542531) 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 7 ways as a sum of consecutive naturals, for example, 4857 + ... + 5354.

It is an arithmetic number, because the mean of its divisors is an integer number (428904).

2^2542539 is an apocalyptic number.

2542539 is a deficient number, since it is larger than the sum of its proper divisors (888693).

2542539 is a wasteful number, since it uses less digits than its factorization.

2542539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10297.

The product of its digits is 10800, while the sum is 30.

The square root of 2542539 is about 1594.5341012346. The cubic root of 2542539 is about 136.4863462305.

It can be divided in two parts, 2542 and 539, that added together give a triangular number (3081 = T₇₈).

The spelling of 2542539 in words is "two million, five hundred forty-two thousand, five hundred thirty-nine".