243580 has 24 divisors (see below), whose sum is σ = 539280. Its totient is φ = 92160.

The previous prime is 243577. The next prime is 243583. The reversal of 243580 is 85342.

243580 = T₃₉ + T₄₀ + ... + T₁₁₄.

243580 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (243577) and next prime (243583).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60 + ... + 700.

It is an arithmetic number, because the mean of its divisors is an integer number (22470).

2²⁴³⁵⁸⁰ is an apocalyptic number.

243580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269640).

243580 is an abundant number, since it is smaller than the sum of its proper divisors (295700).

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

243580 is a wasteful number, since it uses less digits than its factorization.

243580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 243580 is about 493.5382457318. The cubic root of 243580 is about 62.4521233346.

The spelling of 243580 in words is "two hundred forty-three thousand, five hundred eighty".