242513 has 4 divisors (see below), whose sum is σ = 250368. Its totient is φ = 234660.

The previous prime is 242509. The next prime is 242519. The reversal of 242513 is 315242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242513 - 2² = 242509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242491 and 242500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242519) 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, 3881 + ... + 3942.

It is an arithmetic number, because the mean of its divisors is an integer number (62592).

2²⁴²⁵¹³ is an apocalyptic number.

It is an amenable number.

242513 is a deficient number, since it is larger than the sum of its proper divisors (7855).

242513 is an equidigital number, since it uses as much as digits as its factorization.

242513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7854.

The product of its digits is 240, while the sum is 17.

The square root of 242513 is about 492.4560894131. The cubic root of 242513 is about 62.3607995352.

Adding to 242513 its reverse (315242), we get a palindrome (557755).

The spelling of 242513 in words is "two hundred forty-two thousand, five hundred thirteen".