242045 has 4 divisors (see below), whose sum is σ = 290460. Its totient is φ = 193632.

The previous prime is 242009. The next prime is 242057. The reversal of 242045 is 540242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540242 = 2 ⋅270121.

It can be written as a sum of positive squares in 2 ways, for example, as 190969 + 51076 = 437^2 + 226^2 .

It is a cyclic number.

It is not a de Polignac number, because 242045 - 2⁶ = 241981 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 4² + 0 + 2¹⁷ + 4³ + 5⁷ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24200 + ... + 24209.

It is an arithmetic number, because the mean of its divisors is an integer number (72615).

2²⁴²⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

242045 is a deficient number, since it is larger than the sum of its proper divisors (48415).

242045 is an equidigital number, since it uses as much as digits as its factorization.

242045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48414.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 242045 is about 491.9806906780. The cubic root of 242045 is about 62.3206592157.

Adding to 242045 its reverse (540242), we get a palindrome (782287).

It can be divided in two parts, 2420 and 45, that multiplied together give a square (108900 = 330²).

The spelling of 242045 in words is "two hundred forty-two thousand, forty-five".