242623 has 4 divisors (see below), whose sum is σ = 243688. Its totient is φ = 241560.

The previous prime is 242621. The next prime is 242629. The reversal of 242623 is 326242.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 242623 - 2¹ = 242621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242621) 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, 36 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (60922).

2²⁴²⁶²³ is an apocalyptic number.

242623 is a deficient number, since it is larger than the sum of its proper divisors (1065).

242623 is an equidigital number, since it uses as much as digits as its factorization.

242623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064.

The product of its digits is 576, while the sum is 19.

The square root of 242623 is about 492.5677618359. The cubic root of 242623 is about 62.3702267289.

Adding to 242623 its reverse (326242), we get a palindrome (568865).

The spelling of 242623 in words is "two hundred forty-two thousand, six hundred twenty-three".