25985149 has 4 divisors (see below), whose sum is σ = 26237536. Its totient is φ = 25732764.

The previous prime is 25985111. The next prime is 25985159. The reversal of 25985149 is 94158952.

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 25985149 - 2¹⁷ = 25854077 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 (25985159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126039 + ... + 126244.

It is an arithmetic number, because the mean of its divisors is an integer number (6559384).

Almost surely, 2^25985149 is an apocalyptic number.

It is an amenable number.

25985149 is a deficient number, since it is larger than the sum of its proper divisors (252387).

25985149 is a wasteful number, since it uses less digits than its factorization.

25985149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252386.

The product of its digits is 129600, while the sum is 43.

The square root of 25985149 is about 5097.5630452207. The cubic root of 25985149 is about 296.1931909324.

The spelling of 25985149 in words is "twenty-five million, nine hundred eighty-five thousand, one hundred forty-nine".