224785 has 16 divisors (see below), whose sum is σ = 303552. Its totient is φ = 158400.

The previous prime is 224771. The next prime is 224797. The reversal of 224785 is 587422.

224785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

224785 is a nontrivial binomial coefficient, being equal to C(671, 2).

It is a de Polignac number, because none of the positive numbers 2^k-224785 is a prime.

It is a Duffinian number.

224785 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3322 + ... + 3388.

It is an arithmetic number, because the mean of its divisors is an integer number (18972).

2²²⁴⁷⁸⁵ is an apocalyptic number.

224785 is the 670-th triangular number.

224785 is the 224-th centered nonagonal number.

It is an amenable number.

224785 is a deficient number, since it is larger than the sum of its proper divisors (78767).

224785 is a wasteful number, since it uses less digits than its factorization.

224785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144.

The product of its digits is 4480, while the sum is 28.

The square root of 224785 is about 474.1149649610. The cubic root of 224785 is about 60.8026408421.

It can be divided in two parts, 2247 and 85, that added together give a palindrome (2332).

The spelling of 224785 in words is "two hundred twenty-four thousand, seven hundred eighty-five".