129469942 has 8 divisors (see below), whose sum is σ = 221948496. Its totient is φ = 55487112.

The previous prime is 129469939. The next prime is 129469973. The reversal of 129469942 is 249964921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 129469892 and 129469901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4623913 + ... + 4623940.

It is an arithmetic number, because the mean of its divisors is an integer number (27743562).

Almost surely, 2^129469942 is an apocalyptic number.

129469942 is a deficient number, since it is larger than the sum of its proper divisors (92478554).

129469942 is an equidigital number, since it uses as much as digits as its factorization.

129469942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9247862.

The product of its digits is 279936, while the sum is 46.

The square root of 129469942 is about 11378.4859273982. The cubic root of 129469942 is about 505.8902598596.

The spelling of 129469942 in words is "one hundred twenty-nine million, four hundred sixty-nine thousand, nine hundred forty-two".