283561 has 4 divisors (see below), whose sum is σ = 285012. Its totient is φ = 282112.

The previous prime is 283553. The next prime is 283571. The reversal of 283561 is 165382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75625 + 207936 = 275^2 + 456^2 .

It is a cyclic number.

It is not a de Polignac number, because 283561 - 2³ = 283553 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 (283501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376 + ... + 841.

It is an arithmetic number, because the mean of its divisors is an integer number (71253).

2²⁸³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

283561 is a deficient number, since it is larger than the sum of its proper divisors (1451).

283561 is a wasteful number, since it uses less digits than its factorization.

283561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450.

The product of its digits is 1440, while the sum is 25.

The square root of 283561 is about 532.5044600752. The cubic root of 283561 is about 65.6974984124.

The spelling of 283561 in words is "two hundred eighty-three thousand, five hundred sixty-one".