1243355051 has 2 divisors, whose sum is σ = 1243355052. Its totient is φ = 1243355050.

The previous prime is 1243355017. The next prime is 1243355081. The reversal of 1243355051 is 1505533421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243355051 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1243355081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621677525 + 621677526.

It is an arithmetic number, because the mean of its divisors is an integer number (621677526).

Almost surely, 2^1243355051 is an apocalyptic number.

1243355051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243355051 is an equidigital number, since it uses as much as digits as its factorization.

1243355051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1243355051 is about 35261.2400661123. The cubic root of 1243355051 is about 1075.3051381126.

Adding to 1243355051 its reverse (1505533421), we get a palindrome (2748888472).

The spelling of 1243355051 in words is "one billion, two hundred forty-three million, three hundred fifty-five thousand, fifty-one".