25123289 has 4 divisors (see below), whose sum is σ = 25135056. Its totient is φ = 25111524.

The previous prime is 25123271. The next prime is 25123303. The reversal of 25123289 is 98232152.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25123289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25123489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679 + ... + 7284.

It is an arithmetic number, because the mean of its divisors is an integer number (6283764).

Almost surely, 2^25123289 is an apocalyptic number.

It is an amenable number.

25123289 is a deficient number, since it is larger than the sum of its proper divisors (11767).

25123289 is an equidigital number, since it uses as much as digits as its factorization.

25123289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11766.

The product of its digits is 8640, while the sum is 32.

The square root of 25123289 is about 5012.3137371876. The cubic root of 25123289 is about 292.8816514658.

The spelling of 25123289 in words is "twenty-five million, one hundred twenty-three thousand, two hundred eighty-nine".