1230125521 has 2 divisors, whose sum is σ = 1230125522. Its totient is φ = 1230125520.

The previous prime is 1230125513. The next prime is 1230125527. The reversal of 1230125521 is 1255210321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725494225 + 504631296 = 26935^2 + 22464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230125521 - 2³ = 1230125513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230125492 and 1230125501.

It is not a weakly prime, because it can be changed into another prime (1230125527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615062760 + 615062761.

It is an arithmetic number, because the mean of its divisors is an integer number (615062761).

Almost surely, 2^1230125521 is an apocalyptic number.

It is an amenable number.

1230125521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230125521 is an equidigital number, since it uses as much as digits as its factorization.

1230125521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1230125521 is about 35073.1452966511. The cubic root of 1230125521 is about 1071.4777151664.

Adding to 1230125521 its reverse (1255210321), we get a palindrome (2485335842).

The spelling of 1230125521 in words is "one billion, two hundred thirty million, one hundred twenty-five thousand, five hundred twenty-one".