12009975 has 24 divisors (see below), whose sum is σ = 20117760. Its totient is φ = 6321120.

The previous prime is 12009971. The next prime is 12009997. The reversal of 12009975 is 57990021.

It is not a de Polignac number, because 12009975 - 2² = 12009971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4912 + ... + 6938.

It is an arithmetic number, because the mean of its divisors is an integer number (838240).

Almost surely, 2^12009975 is an apocalyptic number.

12009975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12009975 is a deficient number, since it is larger than the sum of its proper divisors (8107785).

12009975 is a wasteful number, since it uses less digits than its factorization.

12009975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 12009975 is about 3465.5410832942. The cubic root of 12009975 is about 229.0062671893.

Adding to 12009975 its reverse (57990021), we get a palindrome (69999996).

It can be divided in two parts, 1200 and 9975, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 12009975 in words is "twelve million, nine thousand, nine hundred seventy-five".