243120301 has 2 divisors, whose sum is σ = 243120302. Its totient is φ = 243120300.

The previous prime is 243120299. The next prime is 243120307. The reversal of 243120301 is 103021342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205922500 + 37197801 = 14350^2 + 6099^2 .

It is a cyclic number.

It is not a de Polignac number, because 243120301 - 2¹ = 243120299 is a prime.

Together with 243120299, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243120307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560150 + 121560151.

It is an arithmetic number, because the mean of its divisors is an integer number (121560151).

Almost surely, 2^243120301 is an apocalyptic number.

It is an amenable number.

243120301 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120301 is an equidigital number, since it uses as much as digits as its factorization.

243120301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 243120301 is about 15592.3154470399. The cubic root of 243120301 is about 624.1281077719.

Adding to 243120301 its reverse (103021342), we get a palindrome (346141643).

The spelling of 243120301 in words is "two hundred forty-three million, one hundred twenty thousand, three hundred one".