1230128625 has 32 divisors (see below), whose sum is σ = 2233026432. Its totient is φ = 596424000.

The previous prime is 1230128611. The next prime is 1230128657. The reversal of 1230128625 is 5268210321.

It is not a de Polignac number, because 1230128625 - 2¹² = 1230124529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230128592 and 1230128601.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144982 + ... + 153231.

It is an arithmetic number, because the mean of its divisors is an integer number (69782076).

Almost surely, 2^1230128625 is an apocalyptic number.

1230128625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1230128625 is a deficient number, since it is larger than the sum of its proper divisors (1002897807).

1230128625 is a wasteful number, since it uses less digits than its factorization.

1230128625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298242 (or 298232 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1230128625 is about 35073.1895470030. The cubic root of 1230128625 is about 1071.4786163926.

Adding to 1230128625 its reverse (5268210321), we get a palindrome (6498338946).

The spelling of 1230128625 in words is "one billion, two hundred thirty million, one hundred twenty-eight thousand, six hundred twenty-five".