129266 has 4 divisors (see below), whose sum is σ = 193902. Its totient is φ = 64632.

The previous prime is 129263. The next prime is 129277. The reversal of 129266 is 662921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 108241 + 21025 = 329^2 + 145^2 .

It is not an unprimeable number, because it can be changed into a prime (129263) 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, 32315 + ... + 32318.

2¹²⁹²⁶⁶ is an apocalyptic number.

129266 is a deficient number, since it is larger than the sum of its proper divisors (64636).

129266 is an equidigital number, since it uses as much as digits as its factorization.

129266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64635.

The product of its digits is 1296, while the sum is 26.

The square root of 129266 is about 359.5358118463. The cubic root of 129266 is about 50.5624492918.

The spelling of 129266 in words is "one hundred twenty-nine thousand, two hundred sixty-six".