243020 has 24 divisors (see below), whose sum is σ = 529200. Its totient is φ = 93632.

The previous prime is 243011. The next prime is 243031. The reversal of 243020 is 20342.

243020 = T₆₁ + T₆₂ + ... + T₁₁₈.

It is a junction number, because it is equal to n+sod(n) for n = 242992 and 243010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 789.

It is an arithmetic number, because the mean of its divisors is an integer number (22050).

2²⁴³⁰²⁰ is an apocalyptic number.

243020 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 243020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264600).

243020 is an abundant number, since it is smaller than the sum of its proper divisors (286180).

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

243020 is a wasteful number, since it uses less digits than its factorization.

243020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 243020 is about 492.9705873579. The cubic root of 243020 is about 62.4042266477.

Adding to 243020 its reverse (20342), we get a palindrome (263362).

The spelling of 243020 in words is "two hundred forty-three thousand, twenty", and thus it is an iban number.