1230534521 has 2 divisors, whose sum is σ = 1230534522. Its totient is φ = 1230534520.

The previous prime is 1230534509. The next prime is 1230534541. The reversal of 1230534521 is 1254350321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218010000 + 12524521 = 34900^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230534521 - 2¹⁰ = 1230533497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1230534541) 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, 615267260 + 615267261.

It is an arithmetic number, because the mean of its divisors is an integer number (615267261).

Almost surely, 2^1230534521 is an apocalyptic number.

It is an amenable number.

1230534521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230534521 is an equidigital number, since it uses as much as digits as its factorization.

1230534521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1230534521 is about 35078.9754838992. The cubic root of 1230534521 is about 1071.5964525955.

Adding to 1230534521 its reverse (1254350321), we get a palindrome (2484884842).

The spelling of 1230534521 in words is "one billion, two hundred thirty million, five hundred thirty-four thousand, five hundred twenty-one".