25540123 has 16 divisors (see below), whose sum is σ = 31360000. Its totient is φ = 20734056.

The previous prime is 25540111. The next prime is 25540127. The reversal of 25540123 is 32104552.

It is not a de Polignac number, because 25540123 - 2⁹ = 25539611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25540094 and 25540103.

It is not an unprimeable number, because it can be changed into a prime (25540127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4558 + ... + 8476.

It is an arithmetic number, because the mean of its divisors is an integer number (1960000).

Almost surely, 2^25540123 is an apocalyptic number.

25540123 is a deficient number, since it is larger than the sum of its proper divisors (5819877).

25540123 is an equidigital number, since it uses as much as digits as its factorization.

25540123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959 (or 3945 counting only the distinct ones).

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

The square root of 25540123 is about 5053.7236766566. The cubic root of 25540123 is about 294.4925605584.

Adding to 25540123 its reverse (32104552), we get a palindrome (57644675).

The spelling of 25540123 in words is "twenty-five million, five hundred forty thousand, one hundred twenty-three".