129272282 has 16 divisors (see below), whose sum is σ = 204906240. Its totient is φ = 61041552.

The previous prime is 129272249. The next prime is 129272291. The reversal of 129272282 is 282272921.

It is a super-2 number, since 2×129272282² = 33422645786975048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14153 + ... + 21420.

It is an arithmetic number, because the mean of its divisors is an integer number (12806640).

Almost surely, 2^129272282 is an apocalyptic number.

129272282 is a deficient number, since it is larger than the sum of its proper divisors (75633958).

129272282 is a wasteful number, since it uses less digits than its factorization.

129272282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35677.

The product of its digits is 16128, while the sum is 35.

The square root of 129272282 is about 11369.7969199102. The cubic root of 129272282 is about 505.6326834753.

The spelling of 129272282 in words is "one hundred twenty-nine million, two hundred seventy-two thousand, two hundred eighty-two".