129238246 has 4 divisors (see below), whose sum is σ = 193857372. Its totient is φ = 64619122.

The previous prime is 129238237. The next prime is 129238253. The reversal of 129238246 is 642832921.

It is a happy number.

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

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 as a sum of consecutive naturals, namely, 32309560 + ... + 32309563.

It is an arithmetic number, because the mean of its divisors is an integer number (48464343).

Almost surely, 2^129238246 is an apocalyptic number.

129238246 is a deficient number, since it is larger than the sum of its proper divisors (64619126).

129238246 is an equidigital number, since it uses as much as digits as its factorization.

129238246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64619125.

The product of its digits is 41472, while the sum is 37.

The square root of 129238246 is about 11368.3000488200. The cubic root of 129238246 is about 505.5883036996.

The spelling of 129238246 in words is "one hundred twenty-nine million, two hundred thirty-eight thousand, two hundred forty-six".