129203056 has 20 divisors (see below), whose sum is σ = 252162432. Its totient is φ = 64128896.

The previous prime is 129203051. The next prime is 129203083. The reversal of 129203056 is 650302921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129203051) 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 3 ways as a sum of consecutive naturals, for example, 27280 + ... + 31663.

Almost surely, 2^129203056 is an apocalyptic number.

129203056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129203056 is a deficient number, since it is larger than the sum of its proper divisors (122959376).

129203056 is a wasteful number, since it uses less digits than its factorization.

129203056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59088 (or 59082 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 129203056 is about 11366.7522186419. The cubic root of 129203056 is about 505.5424110221.

Adding to 129203056 its reverse (650302921), we get a palindrome (779505977).

The spelling of 129203056 in words is "one hundred twenty-nine million, two hundred three thousand, fifty-six".