12120225 has 48 divisors (see below), whose sum is σ = 22331904. Its totient is φ = 5760000.

The previous prime is 12120223. The next prime is 12120239. The reversal of 12120225 is 52202121.

It is not a de Polignac number, because 12120225 - 2¹ = 12120223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120223) 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 47 ways as a sum of consecutive naturals, for example, 30025 + ... + 30425.

It is an arithmetic number, because the mean of its divisors is an integer number (465248).

Almost surely, 2^12120225 is an apocalyptic number.

12120225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12120225 is a deficient number, since it is larger than the sum of its proper divisors (10211679).

12120225 is a wasteful number, since it uses less digits than its factorization.

12120225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12120225 is about 3481.4113517365. The cubic root of 12120225 is about 229.7048829919.

Adding to 12120225 its reverse (52202121), we get a palindrome (64322346).

The spelling of 12120225 in words is "twelve million, one hundred twenty thousand, two hundred twenty-five".