242153 has 4 divisors (see below), whose sum is σ = 244608. Its totient is φ = 239700.

The previous prime is 242147. The next prime is 242161. The reversal of 242153 is 351242.

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 an emirpimes, since its reverse is a distinct semiprime: 351242 = 2 ⋅175621.

It is a cyclic number.

It is not a de Polignac number, because 242153 - 2¹⁴ = 225769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073 + ... + 1278.

It is an arithmetic number, because the mean of its divisors is an integer number (61152).

2²⁴²¹⁵³ is an apocalyptic number.

It is an amenable number.

242153 is a deficient number, since it is larger than the sum of its proper divisors (2455).

242153 is a wasteful number, since it uses less digits than its factorization.

242153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454.

The product of its digits is 240, while the sum is 17.

The square root of 242153 is about 492.0904388423. The cubic root of 242153 is about 62.3299269557.

Adding to 242153 its reverse (351242), we get a palindrome (593395).

The spelling of 242153 in words is "two hundred forty-two thousand, one hundred fifty-three".