2505389 has 4 divisors (see below), whose sum is σ = 2586240. Its totient is φ = 2424540.

The previous prime is 2505383. The next prime is 2505401. The reversal of 2505389 is 9835052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2505389 - 2⁸ = 2505133 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 (2505383) 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, 40379 + ... + 40440.

It is an arithmetic number, because the mean of its divisors is an integer number (646560).

2^2505389 is an apocalyptic number.

It is an amenable number.

2505389 is a deficient number, since it is larger than the sum of its proper divisors (80851).

2505389 is an equidigital number, since it uses as much as digits as its factorization.

2505389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80850.

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

The square root of 2505389 is about 1582.8420641365. The cubic root of 2505389 is about 135.8183308191.

The spelling of 2505389 in words is "two million, five hundred five thousand, three hundred eighty-nine".