25487591 has 2 divisors, whose sum is σ = 25487592. Its totient is φ = 25487590.

The previous prime is 25487563. The next prime is 25487597. The reversal of 25487591 is 19578452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25487591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25487597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12743795 + 12743796.

It is an arithmetic number, because the mean of its divisors is an integer number (12743796).

Almost surely, 2^25487591 is an apocalyptic number.

25487591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25487591 is an equidigital number, since it uses as much as digits as its factorization.

25487591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 25487591 is about 5048.5236455819. The cubic root of 25487591 is about 294.2905137375.

The spelling of 25487591 in words is "twenty-five million, four hundred eighty-seven thousand, five hundred ninety-one".