129960146 has 4 divisors (see below), whose sum is σ = 194940222. Its totient is φ = 64980072.

The previous prime is 129960139. The next prime is 129960151. The reversal of 129960146 is 641069921.

129960146 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 83923921 + 46036225 = 9161^2 + 6785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32490035 + ... + 32490038.

Almost surely, 2^129960146 is an apocalyptic number.

129960146 is a deficient number, since it is larger than the sum of its proper divisors (64980076).

129960146 is an equidigital number, since it uses as much as digits as its factorization.

129960146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64980075.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 129960146 is about 11400.0064035070. The cubic root of 129960146 is about 506.5279293693.

The spelling of 129960146 in words is "one hundred twenty-nine million, nine hundred sixty thousand, one hundred forty-six".