121966 has 8 divisors (see below), whose sum is σ = 197064. Its totient is φ = 56280.

The previous prime is 121963. The next prime is 121967. The reversal of 121966 is 669121.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 121966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121963) 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, 2320 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (24633).

2¹²¹⁹⁶⁶ is an apocalyptic number.

121966 is a deficient number, since it is larger than the sum of its proper divisors (75098).

121966 is a wasteful number, since it uses less digits than its factorization.

121966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4706.

The product of its digits is 648, while the sum is 25.

The square root of 121966 is about 349.2363096816. The cubic root of 121966 is about 49.5921488614.

It can be divided in two parts, 121 and 966, that multiplied together give a triangular number (116886 = T₄₈₃).

The spelling of 121966 in words is "one hundred twenty-one thousand, nine hundred sixty-six".