12109825 has 24 divisors (see below), whose sum is σ = 18484928. Its totient is φ = 7663680.

The previous prime is 12109817. The next prime is 12109843. The reversal of 12109825 is 52890121.

It is not a de Polignac number, because 12109825 - 2³ = 12109817 is a prime.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 12109793 and 12109802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387 + ... + 4936.

Almost surely, 2^12109825 is an apocalyptic number.

It is an amenable number.

12109825 is a deficient number, since it is larger than the sum of its proper divisors (6375103).

12109825 is a wasteful number, since it uses less digits than its factorization.

12109825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353 (or 5348 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12109825 is about 3479.9173840768. The cubic root of 12109825 is about 229.6391632438.

Adding to 12109825 its reverse (52890121), we get a palindrome (64999946).

The spelling of 12109825 in words is "twelve million, one hundred nine thousand, eight hundred twenty-five".