25605243 has 12 divisors (see below), whose sum is σ = 37454560. Its totient is φ = 16853616.

The previous prime is 25605241. The next prime is 25605259. The reversal of 25605243 is 34250652.

It is not a de Polignac number, because 25605243 - 2¹ = 25605241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25605241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17296 + ... + 18717.

Almost surely, 2^25605243 is an apocalyptic number.

25605243 is a deficient number, since it is larger than the sum of its proper divisors (11849317).

25605243 is a wasteful number, since it uses less digits than its factorization.

25605243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36098 (or 36095 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 25605243 is about 5060.1623491742. The cubic root of 25605243 is about 294.7426387023.

Adding to 25605243 its reverse (34250652), we get a palindrome (59855895).

The spelling of 25605243 in words is "twenty-five million, six hundred five thousand, two hundred forty-three".