25610243 has 4 divisors (see below), whose sum is σ = 25620528. Its totient is φ = 25599960.

The previous prime is 25610237. The next prime is 25610257. The reversal of 25610243 is 34201652.

It is a semiprime because it is the product of two primes, 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-25610243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25610213) 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, 1205 + ... + 7257.

It is an arithmetic number, because the mean of its divisors is an integer number (6405132).

Almost surely, 2^25610243 is an apocalyptic number.

25610243 is a deficient number, since it is larger than the sum of its proper divisors (10285).

25610243 is an equidigital number, since it uses as much as digits as its factorization.

25610243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10284.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 25610243 is about 5060.6563803523. The cubic root of 25610243 is about 294.7618224984.

Adding to 25610243 its reverse (34201652), we get a palindrome (59811895).

The spelling of 25610243 in words is "twenty-five million, six hundred ten thousand, two hundred forty-three".