1230520043 has 2 divisors, whose sum is σ = 1230520044. Its totient is φ = 1230520042.

The previous prime is 1230520013. The next prime is 1230520051. The reversal of 1230520043 is 3400250321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230520043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230519997 and 1230520024.

It is not a weakly prime, because it can be changed into another prime (1230520013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615260021 + 615260022.

It is an arithmetic number, because the mean of its divisors is an integer number (615260022).

Almost surely, 2^1230520043 is an apocalyptic number.

1230520043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230520043 is an equidigital number, since it uses as much as digits as its factorization.

1230520043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1230520043 is about 35078.7691203668. The cubic root of 1230520043 is about 1071.5922499139.

Adding to 1230520043 its reverse (3400250321), we get a palindrome (4630770364).

The spelling of 1230520043 in words is "one billion, two hundred thirty million, five hundred twenty thousand, forty-three".