242519 has 2 divisors, whose sum is σ = 242520. Its totient is φ = 242518.

The previous prime is 242509. The next prime is 242521. The reversal of 242519 is 915242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242519 - 2¹² = 238423 is a prime.

It is a super-2 number, since 2×242519² = 117630930722, which contains 22 as substring.

Together with 242521, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 242494 and 242503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121259 + 121260.

It is an arithmetic number, because the mean of its divisors is an integer number (121260).

2²⁴²⁵¹⁹ is an apocalyptic number.

242519 is a deficient number, since it is larger than the sum of its proper divisors (1).

242519 is an equidigital number, since it uses as much as digits as its factorization.

242519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 242519 is about 492.4621812891. The cubic root of 242519 is about 62.3613138192.

The spelling of 242519 in words is "two hundred forty-two thousand, five hundred nineteen".