2540123 has 4 divisors (see below), whose sum is σ = 2689560. Its totient is φ = 2390688.

The previous prime is 2540113. The next prime is 2540141. The reversal of 2540123 is 3210452.

2540123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2540123 - 2¹⁴ = 2523739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 149419 = 2540123 / (2 + 5 + 4 + 0 + 1 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74693 + ... + 74726.

It is an arithmetic number, because the mean of its divisors is an integer number (672390).

2^2540123 is an apocalyptic number.

2540123 is a deficient number, since it is larger than the sum of its proper divisors (149437).

2540123 is a wasteful number, since it uses less digits than its factorization.

2540123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149436.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2540123 is about 1593.7763331158. The cubic root of 2540123 is about 136.4431013332.

Adding to 2540123 its reverse (3210452), we get a palindrome (5750575).

The spelling of 2540123 in words is "two million, five hundred forty thousand, one hundred twenty-three".