242547 has 4 divisors (see below), whose sum is σ = 323400. Its totient is φ = 161696.

The previous prime is 242533. The next prime is 242551. The reversal of 242547 is 745242.

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 242547 - 2⁶ = 242483 is a prime.

It is a D-number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (242147) 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, 40422 + ... + 40427.

It is an arithmetic number, because the mean of its divisors is an integer number (80850).

2²⁴²⁵⁴⁷ is an apocalyptic number.

242547 is a deficient number, since it is larger than the sum of its proper divisors (80853).

242547 is an equidigital number, since it uses as much as digits as its factorization.

242547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80852.

The product of its digits is 2240, while the sum is 24.

The square root of 242547 is about 492.4906090475. The cubic root of 242547 is about 62.3637136994.

Adding to 242547 its reverse (745242), we get a palindrome (987789).

The spelling of 242547 in words is "two hundred forty-two thousand, five hundred forty-seven".