1204001243 has 2 divisors, whose sum is σ = 1204001244. Its totient is φ = 1204001242.

The previous prime is 1204001233. The next prime is 1204001257. The reversal of 1204001243 is 3421004021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1204001243 - 2⁶ = 1204001179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1204001213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602000621 + 602000622.

It is an arithmetic number, because the mean of its divisors is an integer number (602000622).

Almost surely, 2^1204001243 is an apocalyptic number.

1204001243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204001243 is an equidigital number, since it uses as much as digits as its factorization.

1204001243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1204001243 is about 34698.7210571226. The cubic root of 1204001243 is about 1063.8383575253.

Adding to 1204001243 its reverse (3421004021), we get a palindrome (4625005264).

The spelling of 1204001243 in words is "one billion, two hundred four million, one thousand, two hundred forty-three".