129243222 has 32 divisors (see below), whose sum is σ = 288718560. Its totient is φ = 42854400.

The previous prime is 129243181. The next prime is 129243259. The reversal of 129243222 is 222342921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4222 + ... + 16622.

It is an arithmetic number, because the mean of its divisors is an integer number (9022455).

Almost surely, 2^129243222 is an apocalyptic number.

129243222 is an abundant number, since it is smaller than the sum of its proper divisors (159475338).

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

129243222 is a wasteful number, since it uses less digits than its factorization.

129243222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12605 (or 12599 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 129243222 is about 11368.5189008947. The cubic root of 129243222 is about 505.5947924267.

The spelling of 129243222 in words is "one hundred twenty-nine million, two hundred forty-three thousand, two hundred twenty-two".