25865481 has 4 divisors (see below), whose sum is σ = 34487312. Its totient is φ = 17243652.

The previous prime is 25865459. The next prime is 25865503. The reversal of 25865481 is 18456852.

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 an interprime number because it is at equal distance from previous prime (25865459) and next prime (25865503).

It is not a de Polignac number, because 25865481 - 2¹⁴ = 25849097 is a prime.

It is a super-2 number, since 2×25865481² = 1338046214722722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25865401) 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, 4310911 + ... + 4310916.

It is an arithmetic number, because the mean of its divisors is an integer number (8621828).

Almost surely, 2^25865481 is an apocalyptic number.

It is an amenable number.

25865481 is a deficient number, since it is larger than the sum of its proper divisors (8621831).

25865481 is an equidigital number, since it uses as much as digits as its factorization.

25865481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8621830.

The product of its digits is 76800, while the sum is 39.

The square root of 25865481 is about 5085.8117346201. The cubic root of 25865481 is about 295.7378103462.

The spelling of 25865481 in words is "twenty-five million, eight hundred sixty-five thousand, four hundred eighty-one".