242813 has 2 divisors, whose sum is σ = 242814. Its totient is φ = 242812.

The previous prime is 242807. The next prime is 242819. The reversal of 242813 is 318242.

It is a balanced prime because it is at equal distance from previous prime (242807) and next prime (242819).

It can be written as a sum of positive squares in only one way, i.e., 139129 + 103684 = 373^2 + 322^2 .

It is a cyclic number.

It is not a de Polignac number, because 242813 - 2⁴ = 242797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121406 + 121407.

It is an arithmetic number, because the mean of its divisors is an integer number (121407).

2²⁴²⁸¹³ is an apocalyptic number.

It is an amenable number.

242813 is a deficient number, since it is larger than the sum of its proper divisors (1).

242813 is an equidigital number, since it uses as much as digits as its factorization.

242813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 242813 is about 492.7605909567. The cubic root of 242813 is about 62.3865033543.

The spelling of 242813 in words is "two hundred forty-two thousand, eight hundred thirteen".