129089442 has 16 divisors (see below), whose sum is σ = 258446880. Its totient is φ = 42985152.

The previous prime is 129089407. The next prime is 129089459. The reversal of 129089442 is 244980921.

It is a self number, because there is not a number n which added to its sum of digits gives 129089442.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4608 + ... + 16715.

It is an arithmetic number, because the mean of its divisors is an integer number (16152930).

Almost surely, 2^129089442 is an apocalyptic number.

129089442 is an abundant number, since it is smaller than the sum of its proper divisors (129357438).

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

129089442 is a wasteful number, since it uses less digits than its factorization.

129089442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22337.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 129089442 is about 11361.7534738261. The cubic root of 129089442 is about 505.3941855826.

The spelling of 129089442 in words is "one hundred twenty-nine million, eighty-nine thousand, four hundred forty-two".