121879 has 4 divisors (see below), whose sum is σ = 122584. Its totient is φ = 121176.

The previous prime is 121867. The next prime is 121883. The reversal of 121879 is 978121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121879 - 2⁹ = 121367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121889) 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, 109 + ... + 505.

It is an arithmetic number, because the mean of its divisors is an integer number (30646).

2¹²¹⁸⁷⁹ is an apocalyptic number.

121879 is a deficient number, since it is larger than the sum of its proper divisors (705).

121879 is an equidigital number, since it uses as much as digits as its factorization.

121879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704.

The product of its digits is 1008, while the sum is 28.

The square root of 121879 is about 349.1117299662. Note that the first 3 decimals coincide. The cubic root of 121879 is about 49.5803544727.

It can be divided in two parts, 121 and 879, that added together give a cube (1000 = 10³).

The spelling of 121879 in words is "one hundred twenty-one thousand, eight hundred seventy-nine".