121747866 has 8 divisors (see below), whose sum is σ = 243495744. Its totient is φ = 40582620.

The previous prime is 121747861. The next prime is 121747883. The reversal of 121747866 is 668747121.

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

121747866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (121747861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10145650 + ... + 10145661.

It is an arithmetic number, because the mean of its divisors is an integer number (30436968).

Almost surely, 2^121747866 is an apocalyptic number.

121747866 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.

121747866 is a wasteful number, since it uses less digits than its factorization.

121747866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20291316.

The product of its digits is 112896, while the sum is 42.

The square root of 121747866 is about 11033.9415441627. The cubic root of 121747866 is about 495.6256632930.

The spelling of 121747866 in words is "one hundred twenty-one million, seven hundred forty-seven thousand, eight hundred sixty-six".