121707906 has 8 divisors (see below), whose sum is σ = 243415824. Its totient is φ = 40569300.

The previous prime is 121707889. The next prime is 121707907. The reversal of 121707906 is 609707121.

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

121707906 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (121707907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10142320 + ... + 10142331.

It is an arithmetic number, because the mean of its divisors is an integer number (30426978).

Almost surely, 2^121707906 is an apocalyptic number.

121707906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121707906 is a wasteful number, since it uses less digits than its factorization.

121707906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20284656.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 121707906 is about 11032.1306192412. The cubic root of 121707906 is about 495.5714327224.

The spelling of 121707906 in words is "one hundred twenty-one million, seven hundred seven thousand, nine hundred six".