1243004051 has 2 divisors, whose sum is σ = 1243004052. Its totient is φ = 1243004050.

The previous prime is 1243004039. The next prime is 1243004057. The reversal of 1243004051 is 1504003421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1504003421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243004051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243004057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621502025 + 621502026.

It is an arithmetic number, because the mean of its divisors is an integer number (621502026).

Almost surely, 2^1243004051 is an apocalyptic number.

1243004051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243004051 is an equidigital number, since it uses as much as digits as its factorization.

1243004051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1243004051 is about 35256.2625784413. The cubic root of 1243004051 is about 1075.2039421254.

Adding to 1243004051 its reverse (1504003421), we get a palindrome (2747007472).

The spelling of 1243004051 in words is "one billion, two hundred forty-three million, four thousand, fifty-one".