129240706 has 8 divisors (see below), whose sum is σ = 221555520. Its totient is φ = 55388868.

The previous prime is 129240691. The next prime is 129240737. The reversal of 129240706 is 607042921.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4615726 + ... + 4615753.

It is an arithmetic number, because the mean of its divisors is an integer number (27694440).

Almost surely, 2^129240706 is an apocalyptic number.

129240706 is a deficient number, since it is larger than the sum of its proper divisors (92314814).

129240706 is an equidigital number, since it uses as much as digits as its factorization.

129240706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231488.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 129240706 is about 11368.4082439012. The cubic root of 129240706 is about 505.5915115719.

The spelling of 129240706 in words is "one hundred twenty-nine million, two hundred forty thousand, seven hundred six".