121285 has 8 divisors (see below), whose sum is σ = 147456. Its totient is φ = 95760.

The previous prime is 121283. The next prime is 121291. The reversal of 121285 is 582121.

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

It is not a de Polignac number, because 121285 - 2¹ = 121283 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 (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, 540 + ... + 730.

It is an arithmetic number, because the mean of its divisors is an integer number (18432).

2¹²¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

121285 is a deficient number, since it is larger than the sum of its proper divisors (26171).

121285 is a wasteful number, since it uses less digits than its factorization.

121285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323.

The product of its digits is 160, while the sum is 19.

The square root of 121285 is about 348.2599603744. The cubic root of 121285 is about 49.4996769016.

It can be divided in two parts, 121 and 285, that added together give a triangular number (406 = T₂₈).

The spelling of 121285 in words is "one hundred twenty-one thousand, two hundred eighty-five".