243420041 has 2 divisors, whose sum is σ = 243420042. Its totient is φ = 243420040.

The previous prime is 243419989. The next prime is 243420049. The reversal of 243420041 is 140024342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210975625 + 32444416 = 14525^2 + 5696^2 .

It is a cyclic number.

It is not a de Polignac number, because 243420041 - 2¹⁰ = 243419017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243419995 and 243420022.

It is not a weakly prime, because it can be changed into another prime (243420049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121710020 + 121710021.

It is an arithmetic number, because the mean of its divisors is an integer number (121710021).

Almost surely, 2^243420041 is an apocalyptic number.

It is an amenable number.

243420041 is a deficient number, since it is larger than the sum of its proper divisors (1).

243420041 is an equidigital number, since it uses as much as digits as its factorization.

243420041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 243420041 is about 15601.9242723454. The cubic root of 243420041 is about 624.3844956994.

Adding to 243420041 its reverse (140024342), we get a palindrome (383444383).

The spelling of 243420041 in words is "two hundred forty-three million, four hundred twenty thousand, forty-one".