25571671 has 2 divisors, whose sum is σ = 25571672. Its totient is φ = 25571670.

The previous prime is 25571669. The next prime is 25571677. The reversal of 25571671 is 17617552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25571671 - 2¹ = 25571669 is a prime.

Together with 25571669, 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 (25571677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12785835 + 12785836.

It is an arithmetic number, because the mean of its divisors is an integer number (12785836).

Almost surely, 2^25571671 is an apocalyptic number.

25571671 is a deficient number, since it is larger than the sum of its proper divisors (1).

25571671 is an equidigital number, since it uses as much as digits as its factorization.

25571671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 34.

The square root of 25571671 is about 5056.8439762366. The cubic root of 25571671 is about 294.6137662987.

The spelling of 25571671 in words is "twenty-five million, five hundred seventy-one thousand, six hundred seventy-one".