121804 has 12 divisors (see below), whose sum is σ = 219184. Its totient is φ = 59184.

The previous prime is 121789. The next prime is 121843. The reversal of 121804 is 408121.

It is a happy number.

It is an unprimeable number.

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, 264 + ... + 559.

2¹²¹⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

121804 is a deficient number, since it is larger than the sum of its proper divisors (97380).

121804 is a wasteful number, since it uses less digits than its factorization.

121804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 121804 is about 349.0042979678. The cubic root of 121804 is about 49.5701823906.

Adding to 121804 its reverse (408121), we get a palindrome (529925).

The spelling of 121804 in words is "one hundred twenty-one thousand, eight hundred four".