25861169 has 4 divisors (see below), whose sum is σ = 25884144. Its totient is φ = 25838196.

The previous prime is 25861163. The next prime is 25861181. The reversal of 25861169 is 96116852.

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 25861169 - 2⁴ = 25861153 is a prime.

It is a super-2 number, since 2×25861169² = 1337600124093122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25861163) 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, 9707 + ... + 12080.

It is an arithmetic number, because the mean of its divisors is an integer number (6471036).

Almost surely, 2^25861169 is an apocalyptic number.

It is an amenable number.

25861169 is a deficient number, since it is larger than the sum of its proper divisors (22975).

25861169 is a wasteful number, since it uses less digits than its factorization.

25861169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22974.

The product of its digits is 25920, while the sum is 38.

The square root of 25861169 is about 5085.3877924894. The cubic root of 25861169 is about 295.7213754136.

The spelling of 25861169 in words is "twenty-five million, eight hundred sixty-one thousand, one hundred sixty-nine".