129895042 has 4 divisors (see below), whose sum is σ = 194842566. Its totient is φ = 64947520.

The previous prime is 129895037. The next prime is 129895069. The reversal of 129895042 is 240598921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240598921 = 163 ⋅1476067.

It can be written as a sum of positive squares in only one way, i.e., 118396161 + 11498881 = 10881^2 + 3391^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 129894986 and 129895004.

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 as a sum of consecutive naturals, namely, 32473759 + ... + 32473762.

Almost surely, 2^129895042 is an apocalyptic number.

129895042 is a deficient number, since it is larger than the sum of its proper divisors (64947524).

129895042 is an equidigital number, since it uses as much as digits as its factorization.

129895042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64947523.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 129895042 is about 11397.1506088145. The cubic root of 129895042 is about 506.4433329154.

The spelling of 129895042 in words is "one hundred twenty-nine million, eight hundred ninety-five thousand, forty-two".