121873 has 8 divisors (see below), whose sum is σ = 132192. Its totient is φ = 111936.

The previous prime is 121867. The next prime is 121883. The reversal of 121873 is 378121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121873 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (121843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086 + ... + 1192.

It is an arithmetic number, because the mean of its divisors is an integer number (16524).

2¹²¹⁸⁷³ is an apocalyptic number.

It is an amenable number.

121873 is a deficient number, since it is larger than the sum of its proper divisors (10319).

121873 is a wasteful number, since it uses less digits than its factorization.

121873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191.

The product of its digits is 336, while the sum is 22.

The square root of 121873 is about 349.1031366230. The cubic root of 121873 is about 49.5795408597.

Adding to 121873 its reverse (378121), we get a palindrome (499994).

The spelling of 121873 in words is "one hundred twenty-one thousand, eight hundred seventy-three".