243601249 has 2 divisors, whose sum is σ = 243601250. Its totient is φ = 243601248.

The previous prime is 243601231. The next prime is 243601331. The reversal of 243601249 is 942106342.

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., 241584849 + 2016400 = 15543^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 243601249 - 2¹¹ = 243599201 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243601249.

It is not a weakly prime, because it can be changed into another prime (243601549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121800624 + 121800625.

It is an arithmetic number, because the mean of its divisors is an integer number (121800625).

Almost surely, 2^243601249 is an apocalyptic number.

It is an amenable number.

243601249 is a deficient number, since it is larger than the sum of its proper divisors (1).

243601249 is an equidigital number, since it uses as much as digits as its factorization.

243601249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 243601249 is about 15607.7304243762. The cubic root of 243601249 is about 624.5393931095.

The spelling of 243601249 in words is "two hundred forty-three million, six hundred one thousand, two hundred forty-nine".