25765547 has 2 divisors, whose sum is σ = 25765548. Its totient is φ = 25765546.

The previous prime is 25765517. The next prime is 25765549. The reversal of 25765547 is 74556752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25765547 - 2⁶ = 25765483 is a prime.

Together with 25765549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25765549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12882773 + 12882774.

It is an arithmetic number, because the mean of its divisors is an integer number (12882774).

Almost surely, 2^25765547 is an apocalyptic number.

25765547 is a deficient number, since it is larger than the sum of its proper divisors (1).

25765547 is an equidigital number, since it uses as much as digits as its factorization.

25765547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294000, while the sum is 41.

The square root of 25765547 is about 5075.9774428183. The cubic root of 25765547 is about 295.3564474241.

The spelling of 25765547 in words is "twenty-five million, seven hundred sixty-five thousand, five hundred forty-seven".