12681236 has 12 divisors (see below), whose sum is σ = 22957620. Its totient is φ = 6121920.

The previous prime is 12681233. The next prime is 12681247. The reversal of 12681236 is 63218621.

It can be written as a sum of positive squares in 2 ways, for example, as 5973136 + 6708100 = 2444^2 + 2590^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 12681199 and 12681208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54545 + ... + 54776.

It is an arithmetic number, because the mean of its divisors is an integer number (1913135).

Almost surely, 2^12681236 is an apocalyptic number.

It is an amenable number.

12681236 is a deficient number, since it is larger than the sum of its proper divisors (10276384).

12681236 is a wasteful number, since it uses less digits than its factorization.

12681236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109354 (or 109352 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 12681236 is about 3561.0723104144. The cubic root of 12681236 is about 233.1956947895.

Adding to 12681236 its reverse (63218621), we get a palindrome (75899857).

The spelling of 12681236 in words is "twelve million, six hundred eighty-one thousand, two hundred thirty-six".