12436 has 6 divisors (see below), whose sum is σ = 21770. Its totient is φ = 6216.

The previous prime is 12433. The next prime is 12437. The reversal of 12436 is 63421.

It can be written as a sum of positive squares in only one way, i.e., 8836 + 3600 = 94^2 + 60^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1551 + ... + 1558.

2¹²⁴³⁶ is an apocalyptic number.

It is an amenable number.

12436 is a deficient number, since it is larger than the sum of its proper divisors (9334).

12436 is a wasteful number, since it uses less digits than its factorization.

12436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113 (or 3111 counting only the distinct ones).

The product of its digits is 144, while the sum is 16.

The square root of 12436 is about 111.5168148756. The cubic root of 12436 is about 23.1682681524.

Adding to 12436 its reverse (63421), we get a palindrome (75857).

The spelling of 12436 in words is "twelve thousand, four hundred thirty-six".