121284 has 24 divisors (see below), whose sum is σ = 314720. Its totient is φ = 40392.

The previous prime is 121283. The next prime is 121291. The reversal of 121284 is 482121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121283) 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, 454 + ... + 669.

2¹²¹²⁸⁴ is an apocalyptic number.

It is an amenable number.

121284 is an abundant number, since it is smaller than the sum of its proper divisors (193436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121284 is a wasteful number, since it uses less digits than its factorization.

121284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136 (or 1128 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 121284 is about 348.2585246624. The cubic root of 121284 is about 49.4995408589.

It can be divided in two parts, 1212 and 84, that added together give a 4-th power (1296 = 6⁴).

The spelling of 121284 in words is "one hundred twenty-one thousand, two hundred eighty-four".