129236 has 6 divisors (see below), whose sum is σ = 226170. Its totient is φ = 64616.

The previous prime is 129229. The next prime is 129263. The reversal of 129236 is 632921.

It can be written as a sum of positive squares in only one way, i.e., 126736 + 2500 = 356^2 + 50^2 .

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

It is a congruent number.

It is an unprimeable number.

129236 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16151 + ... + 16158.

It is an arithmetic number, because the mean of its divisors is an integer number (37695).

2¹²⁹²³⁶ is an apocalyptic number.

It is an amenable number.

129236 is a deficient number, since it is larger than the sum of its proper divisors (96934).

129236 is a wasteful number, since it uses less digits than its factorization.

129236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32313 (or 32311 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 129236 is about 359.4940889639. The cubic root of 129236 is about 50.5585374851.

The spelling of 129236 in words is "one hundred twenty-nine thousand, two hundred thirty-six".