2540515 has 4 divisors (see below), whose sum is σ = 3048624. Its totient is φ = 2032408.

The previous prime is 2540513. The next prime is 2540519. The reversal of 2540515 is 5150452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2540515 - 2¹ = 2540513 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540513) 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, 254047 + ... + 254056.

It is an arithmetic number, because the mean of its divisors is an integer number (762156).

2^2540515 is an apocalyptic number.

2540515 is a deficient number, since it is larger than the sum of its proper divisors (508109).

2540515 is an equidigital number, since it uses as much as digits as its factorization.

2540515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508108.

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

The square root of 2540515 is about 1593.8993067318. The cubic root of 2540515 is about 136.4501197524.

Adding to 2540515 its reverse (5150452), we get a palindrome (7690967).

The spelling of 2540515 in words is "two million, five hundred forty thousand, five hundred fifteen".