25554161 has 8 divisors (see below), whose sum is σ = 26607144. Its totient is φ = 24520320.

The previous prime is 25554157. The next prime is 25554163. The reversal of 25554161 is 16145552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12816400 + 12737761 = 3580^2 + 3569^2 .

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 25554161 - 2² = 25554157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25554163) 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, 2030 + ... + 7431.

It is an arithmetic number, because the mean of its divisors is an integer number (3325893).

Almost surely, 2^25554161 is an apocalyptic number.

It is an amenable number.

25554161 is a deficient number, since it is larger than the sum of its proper divisors (1052983).

25554161 is an equidigital number, since it uses as much as digits as its factorization.

25554161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571.

The product of its digits is 6000, while the sum is 29.

The square root of 25554161 is about 5055.1123627472. The cubic root of 25554161 is about 294.5465061269.

The spelling of 25554161 in words is "twenty-five million, five hundred fifty-four thousand, one hundred sixty-one".