12209961 has 12 divisors (see below), whose sum is σ = 17295152. Its totient is φ = 7660608.

The previous prime is 12209959. The next prime is 12209969. The reversal of 12209961 is 16990221.

It is a happy number.

It is not a de Polignac number, because 12209961 - 2¹ = 12209959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209969) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6175 + ... + 7908.

Almost surely, 2^12209961 is an apocalyptic number.

It is an amenable number.

12209961 is a deficient number, since it is larger than the sum of its proper divisors (5085191).

12209961 is a wasteful number, since it uses less digits than its factorization.

12209961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14120 (or 14103 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 12209961 is about 3494.2754613797. The cubic root of 12209961 is about 230.2703877420.

The spelling of 12209961 in words is "twelve million, two hundred nine thousand, nine hundred sixty-one".