25985129 has 4 divisors (see below), whose sum is σ = 27513684. Its totient is φ = 24456576.

The previous prime is 25985111. The next prime is 25985159. The reversal of 25985129 is 92158952.

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 24157225 + 1827904 = 4915^2 + 1352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25985129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25985159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764252 + ... + 764285.

It is an arithmetic number, because the mean of its divisors is an integer number (6878421).

Almost surely, 2^25985129 is an apocalyptic number.

It is an amenable number.

25985129 is a deficient number, since it is larger than the sum of its proper divisors (1528555).

25985129 is a wasteful number, since it uses less digits than its factorization.

25985129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528554.

The product of its digits is 64800, while the sum is 41.

The square root of 25985129 is about 5097.5610834987. The cubic root of 25985129 is about 296.1931149420.

The spelling of 25985129 in words is "twenty-five million, nine hundred eighty-five thousand, one hundred twenty-nine".