129711226 has 4 divisors (see below), whose sum is σ = 194566842. Its totient is φ = 64855612.

The previous prime is 129711221. The next prime is 129711289. The reversal of 129711226 is 622117921.

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., 118788201 + 10923025 = 10899^2 + 3305^2 .

It is not an unprimeable number, because it can be changed into a prime (129711221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32427805 + ... + 32427808.

Almost surely, 2^129711226 is an apocalyptic number.

129711226 is a deficient number, since it is larger than the sum of its proper divisors (64855616).

129711226 is an equidigital number, since it uses as much as digits as its factorization.

129711226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64855615.

The product of its digits is 3024, while the sum is 31.

The square root of 129711226 is about 11389.0836330233. The cubic root of 129711226 is about 506.2043288373.

The spelling of 129711226 in words is "one hundred twenty-nine million, seven hundred eleven thousand, two hundred twenty-six".