2520839 has 4 divisors (see below), whose sum is σ = 2568456. Its totient is φ = 2473224.

The previous prime is 2520829. The next prime is 2520841. The reversal of 2520839 is 9380252.

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 2520839 - 2¹⁶ = 2455303 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 (2520829) 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, 23729 + ... + 23834.

It is an arithmetic number, because the mean of its divisors is an integer number (642114).

2^2520839 is an apocalyptic number.

2520839 is a deficient number, since it is larger than the sum of its proper divisors (47617).

2520839 is an equidigital number, since it uses as much as digits as its factorization.

2520839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47616.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2520839 is about 1587.7150248077. The cubic root of 2520839 is about 136.0969428478.

The spelling of 2520839 in words is "two million, five hundred twenty thousand, eight hundred thirty-nine".