25278823 has 4 divisors (see below), whose sum is σ = 25310880. Its totient is φ = 25246768.

The previous prime is 25278821. The next prime is 25278833. The reversal of 25278823 is 32887252.

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 25278823 - 2¹ = 25278821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25278821) 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 3 ways as a sum of consecutive naturals, for example, 14815 + ... + 16432.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^25278823 is an apocalyptic number.

25278823 is a deficient number, since it is larger than the sum of its proper divisors (32057).

25278823 is an equidigital number, since it uses as much as digits as its factorization.

25278823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32056.

The product of its digits is 53760, while the sum is 37.

The square root of 25278823 is about 5027.8049882628. The cubic root of 25278823 is about 293.4848019666.

The spelling of 25278823 in words is "twenty-five million, two hundred seventy-eight thousand, eight hundred twenty-three".