242723 has 4 divisors (see below), whose sum is σ = 261408. Its totient is φ = 224040.

The previous prime is 242713. The next prime is 242729. The reversal of 242723 is 327242.

It is a happy number.

242723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327242 = 2 ⋅163621.

It is a cyclic number.

It is not a de Polignac number, because 242723 - 2⁶ = 242659 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 242695 and 242704.

It is not an unprimeable number, because it can be changed into a prime (242729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9323 + ... + 9348.

It is an arithmetic number, because the mean of its divisors is an integer number (65352).

2²⁴²⁷²³ is an apocalyptic number.

242723 is a deficient number, since it is larger than the sum of its proper divisors (18685).

242723 is a wasteful number, since it uses less digits than its factorization.

242723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18684.

The product of its digits is 672, while the sum is 20.

The square root of 242723 is about 492.6692602548. The cubic root of 242723 is about 62.3787944326.

Adding to 242723 its reverse (327242), we get a palindrome (569965).

The spelling of 242723 in words is "two hundred forty-two thousand, seven hundred twenty-three", and thus it is an iban number.