129253418 has 16 divisors (see below), whose sum is σ = 221961600. Its totient is φ = 55298256.

The previous prime is 129253417. The next prime is 129253429. The reversal of 129253418 is 814352921.

It is not an unprimeable number, because it can be changed into a prime (129253417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680 + ... + 16092.

It is an arithmetic number, because the mean of its divisors is an integer number (13872600).

Almost surely, 2^129253418 is an apocalyptic number.

129253418 is a deficient number, since it is larger than the sum of its proper divisors (92708182).

129253418 is a wasteful number, since it uses less digits than its factorization.

129253418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16021.

The product of its digits is 17280, while the sum is 35.

The square root of 129253418 is about 11368.9673233764. The cubic root of 129253418 is about 505.6080875377.

The spelling of 129253418 in words is "one hundred twenty-nine million, two hundred fifty-three thousand, four hundred eighteen".