2505909 has 12 divisors (see below), whose sum is σ = 3886944. Its totient is φ = 1431864.

The previous prime is 2505901. The next prime is 2505917. The reversal of 2505909 is 9095052.

It is an interprime number because it is at equal distance from previous prime (2505901) and next prime (2505917).

It is not a de Polignac number, because 2505909 - 2³ = 2505901 is a prime.

2505909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8377 + ... + 8670.

It is an arithmetic number, because the mean of its divisors is an integer number (323912).

2^2505909 is an apocalyptic number.

It is an amenable number.

2505909 is a deficient number, since it is larger than the sum of its proper divisors (1381035).

2505909 is a wasteful number, since it uses less digits than its factorization.

2505909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17064 (or 17057 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 2505909 is about 1583.0063171068. The cubic root of 2505909 is about 135.8277266516.

The spelling of 2505909 in words is "two million, five hundred five thousand, nine hundred nine".