25400123 has 8 divisors (see below), whose sum is σ = 29099520. Its totient is φ = 21718440.

The previous prime is 25400083. The next prime is 25400147. The reversal of 25400123 is 32100452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25400123 - 2⁶ = 25400059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25430123) 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 7 ways as a sum of consecutive naturals, for example, 1193 + ... + 7226.

It is an arithmetic number, because the mean of its divisors is an integer number (3637440).

Almost surely, 2^25400123 is an apocalyptic number.

25400123 is a deficient number, since it is larger than the sum of its proper divisors (3699397).

25400123 is an equidigital number, since it uses as much as digits as its factorization.

25400123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8857.

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

The square root of 25400123 is about 5039.8534700922. The cubic root of 25400123 is about 293.9534803839.

Adding to 25400123 its reverse (32100452), we get a palindrome (57500575).

The spelling of 25400123 in words is "twenty-five million, four hundred thousand, one hundred twenty-three".