129822281 has 16 divisors (see below), whose sum is σ = 138879360. Its totient is φ = 121080960.

The previous prime is 129822257. The next prime is 129822311. The reversal of 129822281 is 182228921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129822281 is a prime.

It is a super-2 number, since 2×129822281² = 33707649288085922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129822211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342350 + ... + 342728.

It is an arithmetic number, because the mean of its divisors is an integer number (8679960).

Almost surely, 2^129822281 is an apocalyptic number.

It is an amenable number.

129822281 is a deficient number, since it is larger than the sum of its proper divisors (9057079).

129822281 is a wasteful number, since it uses less digits than its factorization.

129822281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736.

The product of its digits is 9216, while the sum is 35.

The square root of 129822281 is about 11393.9580919012. The cubic root of 129822281 is about 506.3487534628.

The spelling of 129822281 in words is "one hundred twenty-nine million, eight hundred twenty-two thousand, two hundred eighty-one".