25187471 has 2 divisors, whose sum is σ = 25187472. Its totient is φ = 25187470.

The previous prime is 25187453. The next prime is 25187473. The reversal of 25187471 is 17478152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25187471 is a prime.

It is a super-3 number, since 3×25187471³ (a number of 23 digits) contains 333 as substring.

Together with 25187473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25187473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12593735 + 12593736.

It is an arithmetic number, because the mean of its divisors is an integer number (12593736).

Almost surely, 2^25187471 is an apocalyptic number.

25187471 is a deficient number, since it is larger than the sum of its proper divisors (1).

25187471 is an equidigital number, since it uses as much as digits as its factorization.

25187471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 35.

The square root of 25187471 is about 5018.7120857846. The cubic root of 25187471 is about 293.1308458213.

The spelling of 25187471 in words is "twenty-five million, one hundred eighty-seven thousand, four hundred seventy-one".