25836161 has 8 divisors (see below), whose sum is σ = 28080360. Its totient is φ = 23628672.

The previous prime is 25836149. The next prime is 25836193. The reversal of 25836161 is 16163852.

It is a happy number.

25836161 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 3330625 + 22505536 = 1825^2 + 4744^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25836161 - 2¹⁰ = 25835137 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25836131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7700 + ... + 10533.

It is an arithmetic number, because the mean of its divisors is an integer number (3510045).

Almost surely, 2^25836161 is an apocalyptic number.

It is an amenable number.

25836161 is a deficient number, since it is larger than the sum of its proper divisors (2244199).

25836161 is a wasteful number, since it uses less digits than its factorization.

25836161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18355.

The product of its digits is 8640, while the sum is 32.

The square root of 25836161 is about 5082.9283882424. The cubic root of 25836161 is about 295.6260228634.

The spelling of 25836161 in words is "twenty-five million, eight hundred thirty-six thousand, one hundred sixty-one".