242149 has 4 divisors (see below), whose sum is σ = 243136. Its totient is φ = 241164.

The previous prime is 242147. The next prime is 242161. The reversal of 242149 is 941242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 941242 = 2 ⋅470621.

It is a cyclic number.

It is not a de Polignac number, because 242149 - 2¹ = 242147 is a prime.

It is a super-2 number, since 2×242149² = 117272276402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242147) 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, 202 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (60784).

2²⁴²¹⁴⁹ is an apocalyptic number.

It is an amenable number.

242149 is a deficient number, since it is larger than the sum of its proper divisors (987).

242149 is an equidigital number, since it uses as much as digits as its factorization.

242149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its digits is 576, while the sum is 22.

The square root of 242149 is about 492.0863745320. The cubic root of 242149 is about 62.3295837552.

The spelling of 242149 in words is "two hundred forty-two thousand, one hundred forty-nine".