2505839 has 4 divisors (see below), whose sum is σ = 2863824. Its totient is φ = 2147856.

The previous prime is 2505829. The next prime is 2505847. The reversal of 2505839 is 9385052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505839 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 (2505809) 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, 178982 + ... + 178995.

It is an arithmetic number, because the mean of its divisors is an integer number (715956).

2^2505839 is an apocalyptic number.

2505839 is a deficient number, since it is larger than the sum of its proper divisors (357985).

2505839 is an equidigital number, since it uses as much as digits as its factorization.

2505839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357984.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2505839 is about 1582.9842071227. The cubic root of 2505839 is about 135.8264619037.

The spelling of 2505839 in words is "two million, five hundred five thousand, eight hundred thirty-nine".