242653 has 4 divisors (see below), whose sum is σ = 243648. Its totient is φ = 241660.

The previous prime is 242647. The next prime is 242659. The reversal of 242653 is 356242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (242647) and next prime (242659).

It is a cyclic number.

It is not a de Polignac number, because 242653 - 2⁵ = 242621 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242659) 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 3 ways as a sum of consecutive naturals, for example, 150 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (60912).

2²⁴²⁶⁵³ is an apocalyptic number.

It is an amenable number.

242653 is a deficient number, since it is larger than the sum of its proper divisors (995).

242653 is an equidigital number, since it uses as much as digits as its factorization.

242653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its digits is 1440, while the sum is 22.

The square root of 242653 is about 492.5982135575. The cubic root of 242653 is about 62.3727972872.

Adding to 242653 its reverse (356242), we get a palindrome (598895).

The spelling of 242653 in words is "two hundred forty-two thousand, six hundred fifty-three".