129450972 has 48 divisors (see below), whose sum is σ = 352558080. Its totient is φ = 36197952.

The previous prime is 129450961. The next prime is 129450977. The reversal of 129450972 is 279054921.

It is a self number, because there is not a number n which added to its sum of digits gives 129450972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129450977) 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, 12447 + ... + 20342.

It is an arithmetic number, because the mean of its divisors is an integer number (7344960).

Almost surely, 2^129450972 is an apocalyptic number.

129450972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129450972 is an abundant number, since it is smaller than the sum of its proper divisors (223107108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129450972 is a wasteful number, since it uses less digits than its factorization.

129450972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32850 (or 32848 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 129450972 is about 11377.6523061658. The cubic root of 129450972 is about 505.8655508889.

The spelling of 129450972 in words is "one hundred twenty-nine million, four hundred fifty thousand, nine hundred seventy-two".