242742 has 16 divisors (see below), whose sum is σ = 506880. Its totient is φ = 77352.

The previous prime is 242731. The next prime is 242747. The reversal of 242742 is 247242.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242747) by changing a digit.

242742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742 + ... + 1017.

It is an arithmetic number, because the mean of its divisors is an integer number (31680).

2²⁴²⁷⁴² is an apocalyptic number.

242742 is an abundant number, since it is smaller than the sum of its proper divisors (264138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242742 is a wasteful number, since it uses less digits than its factorization.

242742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its digits is 896, while the sum is 21.

The square root of 242742 is about 492.6885425905. The cubic root of 242742 is about 62.3804220303.

Adding to 242742 its reverse (247242), we get a palindrome (489984).

The spelling of 242742 in words is "two hundred forty-two thousand, seven hundred forty-two", and thus it is an iban number.