1230440525 has 6 divisors (see below), whose sum is σ = 1525746282. Its totient is φ = 984352400.

The previous prime is 1230440509. The next prime is 1230440537. The reversal of 1230440525 is 5250440321.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 428531401 + 801909124 = 20701^2 + 28318^2 .

It is not a de Polignac number, because 1230440525 - 2⁴ = 1230440509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1230440494 and 1230440503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24608786 + ... + 24608835.

It is an arithmetic number, because the mean of its divisors is an integer number (254291047).

Almost surely, 2^1230440525 is an apocalyptic number.

It is an amenable number.

1230440525 is a deficient number, since it is larger than the sum of its proper divisors (295305757).

1230440525 is an equidigital number, since it uses as much as digits as its factorization.

1230440525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49217631 (or 49217626 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1230440525 is about 35077.6356814424. The cubic root of 1230440525 is about 1071.5691667986.

Adding to 1230440525 its reverse (5250440321), we get a palindrome (6480880846).

The spelling of 1230440525 in words is "one billion, two hundred thirty million, four hundred forty thousand, five hundred twenty-five".