25601143 has 4 divisors (see below), whose sum is σ = 25641360. Its totient is φ = 25560928.

The previous prime is 25601137. The next prime is 25601153. The reversal of 25601143 is 34110652.

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 25601143 - 2⁵ = 25601111 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 (25601123) 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, 19138 + ... + 20431.

It is an arithmetic number, because the mean of its divisors is an integer number (6410340).

Almost surely, 2^25601143 is an apocalyptic number.

25601143 is a deficient number, since it is larger than the sum of its proper divisors (40217).

25601143 is an equidigital number, since it uses as much as digits as its factorization.

25601143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40216.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 25601143 is about 5059.7572076138. The cubic root of 25601143 is about 294.7269061260.

Adding to 25601143 its reverse (34110652), we get a palindrome (59711795).

The spelling of 25601143 in words is "twenty-five million, six hundred one thousand, one hundred forty-three".