25587491 has 2 divisors, whose sum is σ = 25587492. Its totient is φ = 25587490.

The previous prime is 25587479. The next prime is 25587503. The reversal of 25587491 is 19478552.

It is a balanced prime because it is at equal distance from previous prime (25587479) and next prime (25587503).

It is a cyclic number.

It is not a de Polignac number, because 25587491 - 2¹⁰ = 25586467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25587421) 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, 12793745 + 12793746.

It is an arithmetic number, because the mean of its divisors is an integer number (12793746).

Almost surely, 2^25587491 is an apocalyptic number.

25587491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25587491 is an equidigital number, since it uses as much as digits as its factorization.

25587491 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 25587491 is about 5058.4079511245. The cubic root of 25587491 is about 294.6745083724.

The spelling of 25587491 in words is "twenty-five million, five hundred eighty-seven thousand, four hundred ninety-one".