2505540 has 24 divisors (see below), whose sum is σ = 7015680. Its totient is φ = 668128.

The previous prime is 2505539. The next prime is 2505541. The reversal of 2505540 is 455052.

It is an interprime number because it is at equal distance from previous prime (2505539) and next prime (2505541).

It is not an unprimeable number, because it can be changed into a prime (2505541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20820 + ... + 20939.

It is an arithmetic number, because the mean of its divisors is an integer number (292320).

2^2505540 is an apocalyptic number.

2505540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2505540 is an abundant number, since it is smaller than the sum of its proper divisors (4510140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2505540 is a wasteful number, since it uses less digits than its factorization.

2505540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41771 (or 41769 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 2505540 is about 1582.8897624282. The cubic root of 2505540 is about 135.8210593582.

The spelling of 2505540 in words is "two million, five hundred five thousand, five hundred forty".