2506540 has 24 divisors (see below), whose sum is σ = 5493600. Its totient is φ = 958848.

The previous prime is 2506523. The next prime is 2506541. The reversal of 2506540 is 456052.

It is not an unprimeable number, because it can be changed into a prime (2506541) 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, 2265 + ... + 3184.

It is an arithmetic number, because the mean of its divisors is an integer number (228900).

2^2506540 is an apocalyptic number.

2506540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2506540 is an abundant number, since it is smaller than the sum of its proper divisors (2987060).

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

2506540 is a wasteful number, since it uses less digits than its factorization.

2506540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5481 (or 5479 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2506540 is about 1583.2056088834. The cubic root of 2506540 is about 135.8391263876.

The spelling of 2506540 in words is "two million, five hundred six thousand, five hundred forty".