25560191 has 2 divisors, whose sum is σ = 25560192. Its totient is φ = 25560190.

The previous prime is 25560137. The next prime is 25560211. The reversal of 25560191 is 19106552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25560191 - 2⁶ = 25560127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25560091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12780095 + 12780096.

It is an arithmetic number, because the mean of its divisors is an integer number (12780096).

Almost surely, 2^25560191 is an apocalyptic number.

25560191 is a deficient number, since it is larger than the sum of its proper divisors (1).

25560191 is an equidigital number, since it uses as much as digits as its factorization.

25560191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 25560191 is about 5055.7087534786. The cubic root of 25560191 is about 294.5696722922.

The spelling of 25560191 in words is "twenty-five million, five hundred sixty thousand, one hundred ninety-one".