129225226 has 16 divisors (see below), whose sum is σ = 208945800. Its totient is φ = 59586048.

The previous prime is 129225223. The next prime is 129225233. The reversal of 129225226 is 622522921.

It can be written as a sum of positive squares in 4 ways, for example, as 129163225 + 62001 = 11365^2 + 249^2 .

It is not an unprimeable number, because it can be changed into a prime (129225221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40290 + ... + 43378.

Almost surely, 2^129225226 is an apocalyptic number.

129225226 is a deficient number, since it is larger than the sum of its proper divisors (79720574).

129225226 is a wasteful number, since it uses less digits than its factorization.

129225226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713.

The product of its digits is 8640, while the sum is 31.

The square root of 129225226 is about 11367.7273894125. The cubic root of 129225226 is about 505.5713247712.

The spelling of 129225226 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, two hundred twenty-six".