129226 has 4 divisors (see below), whose sum is σ = 193842. Its totient is φ = 64612.

The previous prime is 129223. The next prime is 129229. The reversal of 129226 is 622921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622921 = 13 ⋅47917.

It is an interprime number because it is at equal distance from previous prime (129223) and next prime (129229).

It can be written as a sum of positive squares in only one way, i.e., 119025 + 10201 = 345^2 + 101^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 129197 and 129206.

It is not an unprimeable number, because it can be changed into a prime (129221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32305 + ... + 32308.

2¹²⁹²²⁶ is an apocalyptic number.

129226 is a deficient number, since it is larger than the sum of its proper divisors (64616).

129226 is an equidigital number, since it uses as much as digits as its factorization.

129226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64615.

The product of its digits is 432, while the sum is 22.

The square root of 129226 is about 359.4801802603. The cubic root of 129226 is about 50.5572334150.

The spelling of 129226 in words is "one hundred twenty-nine thousand, two hundred twenty-six".