129436 has 6 divisors (see below), whose sum is σ = 226520. Its totient is φ = 64716.

The previous prime is 129419. The next prime is 129439. The reversal of 129436 is 634921.

It is an alternating number because its digits alternate between odd and even.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 129436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16176 + ... + 16183.

2¹²⁹⁴³⁶ is an apocalyptic number.

It is an amenable number.

129436 is a deficient number, since it is larger than the sum of its proper divisors (97084).

129436 is a wasteful number, since it uses less digits than its factorization.

129436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32363 (or 32361 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 129436 is about 359.7721501173. The cubic root of 129436 is about 50.5846047724.

It can be divided in two parts, 129 and 436, that added together give a palindrome (565).

The spelling of 129436 in words is "one hundred twenty-nine thousand, four hundred thirty-six".