242005 has 8 divisors (see below), whose sum is σ = 300600. Its totient is φ = 186816.

The previous prime is 241993. The next prime is 242009. The reversal of 242005 is 500242.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28561 + 213444 = 169^2 + 462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242005 - 2⁵ = 241973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690 + ... + 979.

It is an arithmetic number, because the mean of its divisors is an integer number (37575).

2²⁴²⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

242005 is a deficient number, since it is larger than the sum of its proper divisors (58595).

242005 is a wasteful number, since it uses less digits than its factorization.

242005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 242005 is about 491.9400369964. The cubic root of 242005 is about 62.3172260198.

Adding to 242005 its reverse (500242), we get a palindrome (742247).

The spelling of 242005 in words is "two hundred forty-two thousand, five".