129220244 has 12 divisors (see below), whose sum is σ = 227386068. Its totient is φ = 64252800.

The previous prime is 129220219. The next prime is 129220253. The reversal of 129220244 is 442022921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24403600 + 104816644 = 4940^2 + 10238^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 88517 + ... + 89964.

It is an arithmetic number, because the mean of its divisors is an integer number (18948839).

Almost surely, 2^129220244 is an apocalyptic number.

It is an amenable number.

129220244 is a deficient number, since it is larger than the sum of its proper divisors (98165824).

129220244 is a wasteful number, since it uses less digits than its factorization.

129220244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178666 (or 178664 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 129220244 is about 11367.5082581892. The cubic root of 129220244 is about 505.5648276169.

The spelling of 129220244 in words is "one hundred twenty-nine million, two hundred twenty thousand, two hundred forty-four".