25471487 has 2 divisors, whose sum is σ = 25471488. Its totient is φ = 25471486.

The previous prime is 25471469. The next prime is 25471489. The reversal of 25471487 is 78417452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25471487 is a prime.

Together with 25471489, 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 25471487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25471489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12735743 + 12735744.

It is an arithmetic number, because the mean of its divisors is an integer number (12735744).

Almost surely, 2^25471487 is an apocalyptic number.

25471487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25471487 is an equidigital number, since it uses as much as digits as its factorization.

25471487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 38.

The square root of 25471487 is about 5046.9284718530. The cubic root of 25471487 is about 294.2285194788.

The spelling of 25471487 in words is "twenty-five million, four hundred seventy-one thousand, four hundred eighty-seven".