25587961 has 4 divisors (see below), whose sum is σ = 29243392. Its totient is φ = 21932532.

The previous prime is 25587953. The next prime is 25587973. The reversal of 25587961 is 16978552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25587961 - 2³ = 25587953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25584961) 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 in 3 ways as a sum of consecutive naturals, for example, 1827705 + ... + 1827718.

It is an arithmetic number, because the mean of its divisors is an integer number (7310848).

Almost surely, 2^25587961 is an apocalyptic number.

25587961 is the 2921-st hex number.

It is an amenable number.

25587961 is a deficient number, since it is larger than the sum of its proper divisors (3655431).

25587961 is an equidigital number, since it uses as much as digits as its factorization.

25587961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655430.

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

The square root of 25587961 is about 5058.4544082160. The cubic root of 25587961 is about 294.6763125896.

The spelling of 25587961 in words is "twenty-five million, five hundred eighty-seven thousand, nine hundred sixty-one".