25145171 has 2 divisors, whose sum is σ = 25145172. Its totient is φ = 25145170.

The previous prime is 25145149. The next prime is 25145173. The reversal of 25145171 is 17154152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25145171 is a prime.

Together with 25145173, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25145171.

It is not a weakly prime, because it can be changed into another prime (25145173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12572585 + 12572586.

It is an arithmetic number, because the mean of its divisors is an integer number (12572586).

Almost surely, 2^25145171 is an apocalyptic number.

25145171 is a deficient number, since it is larger than the sum of its proper divisors (1).

25145171 is an equidigital number, since it uses as much as digits as its factorization.

25145171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 26.

The square root of 25145171 is about 5014.4960863481. The cubic root of 25145171 is about 292.9666586017.

The spelling of 25145171 in words is "twenty-five million, one hundred forty-five thousand, one hundred seventy-one".