25540161 has 8 divisors (see below), whose sum is σ = 35845920. Its totient is φ = 16130592.

The previous prime is 25540157. The next prime is 25540181. The reversal of 25540161 is 16104552.

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

It is not a de Polignac number, because 25540161 - 2² = 25540157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25540111) 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 7 ways as a sum of consecutive naturals, for example, 223980 + ... + 224093.

It is an arithmetic number, because the mean of its divisors is an integer number (4480740).

Almost surely, 2^25540161 is an apocalyptic number.

It is an amenable number.

25540161 is a deficient number, since it is larger than the sum of its proper divisors (10305759).

25540161 is a wasteful number, since it uses less digits than its factorization.

25540161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448095.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 25540161 is about 5053.7274362593. The cubic root of 25540161 is about 294.4927066124.

The spelling of 25540161 in words is "twenty-five million, five hundred forty thousand, one hundred sixty-one".