25312123 has 4 divisors (see below), whose sum is σ = 26644360. Its totient is φ = 23979888.

The previous prime is 25312117. The next prime is 25312141. The reversal of 25312123 is 32121352.

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 25312123 - 2¹³ = 25303931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1332217 = 25312123 / (2 + 5 + 3 + 1 + 2 + 1 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25312123.

It is not an unprimeable number, because it can be changed into a prime (25312103) 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, 666090 + ... + 666127.

It is an arithmetic number, because the mean of its divisors is an integer number (6661090).

Almost surely, 2^25312123 is an apocalyptic number.

25312123 is a deficient number, since it is larger than the sum of its proper divisors (1332237).

25312123 is a wasteful number, since it uses less digits than its factorization.

25312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332236.

The product of its digits is 360, while the sum is 19.

The square root of 25312123 is about 5031.1154826738. The cubic root of 25312123 is about 293.6136153964.

Adding to 25312123 its reverse (32121352), we get a palindrome (57433475).

The spelling of 25312123 in words is "twenty-five million, three hundred twelve thousand, one hundred twenty-three".