1230520013 has 2 divisors, whose sum is σ = 1230520014. Its totient is φ = 1230520012.

The previous prime is 1230520007. The next prime is 1230520043. The reversal of 1230520013 is 3100250321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1223110729 + 7409284 = 34973^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230520013 - 2¹⁴ = 1230503629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230519973 and 1230520000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230520043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615260006 + 615260007.

It is an arithmetic number, because the mean of its divisors is an integer number (615260007).

Almost surely, 2^1230520013 is an apocalyptic number.

It is an amenable number.

1230520013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230520013 is an equidigital number, since it uses as much as digits as its factorization.

1230520013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1230520013 is about 35078.7686927577. The cubic root of 1230520013 is about 1071.5922412055.

Adding to 1230520013 its reverse (3100250321), we get a palindrome (4330770334).

The spelling of 1230520013 in words is "one billion, two hundred thirty million, five hundred twenty thousand, thirteen".