2505823 has 4 divisors (see below), whose sum is σ = 2586688. Its totient is φ = 2424960.

The previous prime is 2505809. The next prime is 2505829. The reversal of 2505823 is 3285052.

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 2505823 - 2⁵ = 2505791 is a prime.

It is a d-powerful number, because it can be written as 2¹⁰ + 5⁶ + 0 + 5⁹ + 8³ + 2¹² + 3¹² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505829) 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, 40386 + ... + 40447.

It is an arithmetic number, because the mean of its divisors is an integer number (646672).

2^2505823 is an apocalyptic number.

2505823 is a deficient number, since it is larger than the sum of its proper divisors (80865).

2505823 is an equidigital number, since it uses as much as digits as its factorization.

2505823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80864.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2505823 is about 1582.9791533687. The cubic root of 2505823 is about 135.8261728152.

The spelling of 2505823 in words is "two million, five hundred five thousand, eight hundred twenty-three".