12159225 has 36 divisors (see below), whose sum is σ = 23459436. Its totient is φ = 5984640.

The previous prime is 12159187. The next prime is 12159281. The reversal of 12159225 is 52295121.

It can be written as a sum of positive squares in 6 ways, for example, as 1505529 + 10653696 = 1227^2 + 3264^2 .

It is not a de Polignac number, because 12159225 - 2¹³ = 12151033 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 847 + ... + 5003.

It is an arithmetic number, because the mean of its divisors is an integer number (651651).

Almost surely, 2^12159225 is an apocalyptic number.

12159225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12159225 is a deficient number, since it is larger than the sum of its proper divisors (11300211).

12159225 is a wasteful number, since it uses less digits than its factorization.

12159225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186 (or 4178 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 12159225 is about 3487.0080298158. The cubic root of 12159225 is about 229.9509977522.

It can be divided in two parts, 1215 and 9225, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 12159225 in words is "twelve million, one hundred fifty-nine thousand, two hundred twenty-five".