242643 has 8 divisors (see below), whose sum is σ = 334800. Its totient is φ = 156128.

The previous prime is 242639. The next prime is 242647. The reversal of 242643 is 346242.

It is an interprime number because it is at equal distance from previous prime (242639) and next prime (242647).

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

It is a cyclic number.

It is not a de Polignac number, because 242643 - 2² = 242639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242647) 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, 1308 + ... + 1481.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2²⁴²⁶⁴³ is an apocalyptic number.

242643 is a deficient number, since it is larger than the sum of its proper divisors (92157).

242643 is a wasteful number, since it uses less digits than its factorization.

242643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821.

The product of its digits is 1152, while the sum is 21.

The square root of 242643 is about 492.5880631928. The cubic root of 242643 is about 62.3719404579.

Adding to 242643 its reverse (346242), we get a palindrome (588885).

The spelling of 242643 in words is "two hundred forty-two thousand, six hundred forty-three".