121982 has 8 divisors (see below), whose sum is σ = 209136. Its totient is φ = 52272.

The previous prime is 121967. The next prime is 121993. The reversal of 121982 is 289121.

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

It is a congruent number.

It is an unprimeable number.

121982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4343 + ... + 4370.

It is an arithmetic number, because the mean of its divisors is an integer number (26142).

2¹²¹⁹⁸² is an apocalyptic number.

121982 is a deficient number, since it is larger than the sum of its proper divisors (87154).

121982 is an equidigital number, since it uses as much as digits as its factorization.

121982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722.

The product of its digits is 288, while the sum is 23.

The square root of 121982 is about 349.2592160559. The cubic root of 121982 is about 49.5943173337.

The spelling of 121982 in words is "one hundred twenty-one thousand, nine hundred eighty-two".