1243503133 has 2 divisors, whose sum is σ = 1243503134. Its totient is φ = 1243503132.

The previous prime is 1243503113. The next prime is 1243503139. The reversal of 1243503133 is 3313053421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1240589284 + 2913849 = 35222^2 + 1707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243503133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243503098 and 1243503107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243503139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621751566 + 621751567.

It is an arithmetic number, because the mean of its divisors is an integer number (621751567).

Almost surely, 2^1243503133 is an apocalyptic number.

It is an amenable number.

1243503133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243503133 is an equidigital number, since it uses as much as digits as its factorization.

1243503133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 1243503133 is about 35263.3397879441. The cubic root of 1243503133 is about 1075.3478255746.

Adding to 1243503133 its reverse (3313053421), we get a palindrome (4556556554).

The spelling of 1243503133 in words is "one billion, two hundred forty-three million, five hundred three thousand, one hundred thirty-three".