2515540 has 12 divisors (see below), whose sum is σ = 5282676. Its totient is φ = 1006208.

The previous prime is 2515537. The next prime is 2515553. The reversal of 2515540 is 455152.

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 1628176 = 942^2 + 1276^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62869 + ... + 62908.

It is an arithmetic number, because the mean of its divisors is an integer number (440223).

2^2515540 is an apocalyptic number.

2515540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2515540 is an abundant number, since it is smaller than the sum of its proper divisors (2767136).

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

2515540 is a wasteful number, since it uses less digits than its factorization.

2515540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125786 (or 125784 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2515540 is about 1586.0453965760. The cubic root of 2515540 is about 136.0015138240.

The spelling of 2515540 in words is "two million, five hundred fifteen thousand, five hundred forty".