25961587 has 4 divisors (see below), whose sum is σ = 25974000. Its totient is φ = 25949176.

The previous prime is 25961563. The next prime is 25961597. The reversal of 25961587 is 78516952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25961587 - 2¹¹ = 25959539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25961597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2212 + ... + 7537.

It is an arithmetic number, because the mean of its divisors is an integer number (6493500).

Almost surely, 2^25961587 is an apocalyptic number.

25961587 is a deficient number, since it is larger than the sum of its proper divisors (12413).

25961587 is an equidigital number, since it uses as much as digits as its factorization.

25961587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12412.

The product of its digits is 151200, while the sum is 43.

The square root of 25961587 is about 5095.2514167605. The cubic root of 25961587 is about 296.1036395968.

The spelling of 25961587 in words is "twenty-five million, nine hundred sixty-one thousand, five hundred eighty-seven".