12969861 has 16 divisors (see below), whose sum is σ = 19108224. Its totient is φ = 7783424.

The previous prime is 12969857. The next prime is 12969871. The reversal of 12969861 is 16896921.

It is a cyclic number.

It is not a de Polignac number, because 12969861 - 2² = 12969857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12969821) 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, 4356 + ... + 6701.

It is an arithmetic number, because the mean of its divisors is an integer number (1194264).

Almost surely, 2^12969861 is an apocalyptic number.

It is an amenable number.

12969861 is a deficient number, since it is larger than the sum of its proper divisors (6138363).

12969861 is a wasteful number, since it uses less digits than its factorization.

12969861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100.

The product of its digits is 46656, while the sum is 42.

The square root of 12969861 is about 3601.3693229104. The cubic root of 12969861 is about 234.9516182276.

The spelling of 12969861 in words is "twelve million, nine hundred sixty-nine thousand, eight hundred sixty-one".