25601791 has 2 divisors, whose sum is σ = 25601792. Its totient is φ = 25601790.

The previous prime is 25601789. The next prime is 25601801. The reversal of 25601791 is 19710652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25601791 - 2¹ = 25601789 is a prime.

Together with 25601789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25601701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12800895 + 12800896.

It is an arithmetic number, because the mean of its divisors is an integer number (12800896).

Almost surely, 2^25601791 is an apocalyptic number.

25601791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25601791 is an equidigital number, since it uses as much as digits as its factorization.

25601791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 25601791 is about 5059.8212419017. The cubic root of 25601791 is about 294.7293927522.

The spelling of 25601791 in words is "twenty-five million, six hundred one thousand, seven hundred ninety-one".