2540137 has 4 divisors (see below), whose sum is σ = 2545920. Its totient is φ = 2534356.

The previous prime is 2540113. The next prime is 2540141. The reversal of 2540137 is 7310452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540177) 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, 2173 + ... + 3130.

It is an arithmetic number, because the mean of its divisors is an integer number (636480).

2^2540137 is an apocalyptic number.

It is an amenable number.

2540137 is a deficient number, since it is larger than the sum of its proper divisors (5783).

2540137 is an equidigital number, since it uses as much as digits as its factorization.

2540137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2540137 is about 1593.7807251940. The cubic root of 2540137 is about 136.4433520034.

Adding to 2540137 its reverse (7310452), we get a palindrome (9850589).

The spelling of 2540137 in words is "two million, five hundred forty thousand, one hundred thirty-seven".