25652161 has 4 divisors (see below), whose sum is σ = 25673152. Its totient is φ = 25631172.

The previous prime is 25652149. The next prime is 25652171. The reversal of 25652161 is 16125652.

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 25652161 - 2⁵ = 25652129 is a prime.

It is a super-3 number, since 3×25652161³ (a number of 23 digits) contains 333 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25652111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8541 + ... + 11146.

It is an arithmetic number, because the mean of its divisors is an integer number (6418288).

Almost surely, 2^25652161 is an apocalyptic number.

It is an amenable number.

25652161 is a deficient number, since it is larger than the sum of its proper divisors (20991).

25652161 is a wasteful number, since it uses less digits than its factorization.

25652161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20990.

The product of its digits is 3600, while the sum is 28.

The square root of 25652161 is about 5064.7962446677. The cubic root of 25652161 is about 294.9225536428.

The spelling of 25652161 in words is "twenty-five million, six hundred fifty-two thousand, one hundred sixty-one".