121766 has 8 divisors (see below), whose sum is σ = 184680. Its totient is φ = 60208.

The previous prime is 121763. The next prime is 121787. The reversal of 121766 is 667121.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121763) 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, 71 + ... + 498.

It is an arithmetic number, because the mean of its divisors is an integer number (23085).

2¹²¹⁷⁶⁶ is an apocalyptic number.

121766 is a deficient number, since it is larger than the sum of its proper divisors (62914).

121766 is a wasteful number, since it uses less digits than its factorization.

121766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678.

The product of its digits is 504, while the sum is 23.

The square root of 121766 is about 348.9498531308. The cubic root of 121766 is about 49.5650269418.

Adding to 121766 its reverse (667121), we get a palindrome (788887).

The spelling of 121766 in words is "one hundred twenty-one thousand, seven hundred sixty-six".