12969021 has 16 divisors (see below), whose sum is σ = 18729536. Its totient is φ = 7934976.

The previous prime is 12969007. The next prime is 12969023. The reversal of 12969021 is 12096921.

It is a happy number.

It is not a de Polignac number, because 12969021 - 2¹⁷ = 12837949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12969021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12969023) 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 15 ways as a sum of consecutive naturals, for example, 6666 + ... + 8388.

It is an arithmetic number, because the mean of its divisors is an integer number (1170596).

Almost surely, 2^12969021 is an apocalyptic number.

It is an amenable number.

12969021 is a deficient number, since it is larger than the sum of its proper divisors (5760515).

12969021 is a wasteful number, since it uses less digits than its factorization.

12969021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932.

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

The square root of 12969021 is about 3601.2526987147. The cubic root of 12969021 is about 234.9465458622.

The spelling of 12969021 in words is "twelve million, nine hundred sixty-nine thousand, twenty-one".