242549 has 4 divisors (see below), whose sum is σ = 246720. Its totient is φ = 238380.

The previous prime is 242533. The next prime is 242551. The reversal of 242549 is 945242.

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.

It is a cyclic number.

It is not a de Polignac number, because 242549 - 2⁴ = 242533 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242509) 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, 1997 + ... + 2114.

It is an arithmetic number, because the mean of its divisors is an integer number (61680).

2²⁴²⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

242549 is a deficient number, since it is larger than the sum of its proper divisors (4171).

242549 is an equidigital number, since it uses as much as digits as its factorization.

242549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170.

The product of its digits is 2880, while the sum is 26.

The square root of 242549 is about 492.4926395389. The cubic root of 242549 is about 62.3638851123.

The spelling of 242549 in words is "two hundred forty-two thousand, five hundred forty-nine".