25195261 has 24 divisors (see below), whose sum is σ = 32446680. Its totient is φ = 19377792.

The previous prime is 25195253. The next prime is 25195297. The reversal of 25195261 is 16259152.

It can be written as a sum of positive squares in 4 ways, for example, as 3980025 + 21215236 = 1995^2 + 4606^2 .

It is not a de Polignac number, because 25195261 - 2³ = 25195253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25195211) 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 23 ways as a sum of consecutive naturals, for example, 23035 + ... + 24103.

It is an arithmetic number, because the mean of its divisors is an integer number (1351945).

Almost surely, 2^25195261 is an apocalyptic number.

It is an amenable number.

25195261 is a deficient number, since it is larger than the sum of its proper divisors (7251419).

25195261 is a wasteful number, since it uses less digits than its factorization.

25195261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1126 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 25195261 is about 5019.4881213128. The cubic root of 25195261 is about 293.1610626159.

The spelling of 25195261 in words is "twenty-five million, one hundred ninety-five thousand, two hundred sixty-one".