25995149 has 4 divisors (see below), whose sum is σ = 26008764. Its totient is φ = 25981536.

The previous prime is 25995131. The next prime is 25995161. The reversal of 25995149 is 94159952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20187049 + 5808100 = 4493^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 25995149 - 2⁸ = 25994893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25995119) 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, 3362 + ... + 7955.

It is an arithmetic number, because the mean of its divisors is an integer number (6502191).

Almost surely, 2^25995149 is an apocalyptic number.

It is an amenable number.

25995149 is a deficient number, since it is larger than the sum of its proper divisors (13615).

25995149 is a wasteful number, since it uses less digits than its factorization.

25995149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13614.

The product of its digits is 145800, while the sum is 44.

The square root of 25995149 is about 5098.5438117172. The cubic root of 25995149 is about 296.2311812481.

The spelling of 25995149 in words is "twenty-five million, nine hundred ninety-five thousand, one hundred forty-nine".