242615 has 4 divisors (see below), whose sum is σ = 291144. Its totient is φ = 194088.

The previous prime is 242603. The next prime is 242617. The reversal of 242615 is 516242.

It is a happy number.

242615 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242615 - 2⁶ = 242551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24257 + ... + 24266.

It is an arithmetic number, because the mean of its divisors is an integer number (72786).

2²⁴²⁶¹⁵ is an apocalyptic number.

242615 is a deficient number, since it is larger than the sum of its proper divisors (48529).

242615 is an equidigital number, since it uses as much as digits as its factorization.

242615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48528.

The product of its digits is 480, while the sum is 20.

The square root of 242615 is about 492.5596410588. The cubic root of 242615 is about 62.3695412109.

Adding to 242615 its reverse (516242), we get a palindrome (758857).

The spelling of 242615 in words is "two hundred forty-two thousand, six hundred fifteen".