121797 has 16 divisors (see below), whose sum is σ = 194880. Its totient is φ = 74736.

The previous prime is 121789. The next prime is 121843. The reversal of 121797 is 797121.

It is not a de Polignac number, because 121797 - 2³ = 121789 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 121797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121727) 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 15 ways as a sum of consecutive naturals, for example, 178 + ... + 524.

It is an arithmetic number, because the mean of its divisors is an integer number (12180).

2¹²¹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

121797 is a deficient number, since it is larger than the sum of its proper divisors (73083).

121797 is a wasteful number, since it uses less digits than its factorization.

121797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its digits is 882, while the sum is 27.

The square root of 121797 is about 348.9942692939. The cubic root of 121797 is about 49.5692327832.

The spelling of 121797 in words is "one hundred twenty-one thousand, seven hundred ninety-seven".