1235128512 has 28 divisors (see below), whose sum is σ = 3267944696. Its totient is φ = 411709440.

The previous prime is 1235128511. The next prime is 1235128529. The reversal of 1235128512 is 2158215321.

It is a self number, because there is not a number n which added to its sum of digits gives 1235128512.

It is not an unprimeable number, because it can be changed into a prime (1235128511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3216289 + ... + 3216672.

Almost surely, 2^1235128512 is an apocalyptic number.

1235128512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1235128512 is an abundant number, since it is smaller than the sum of its proper divisors (2032816184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1235128512 is an equidigital number, since it uses as much as digits as its factorization.

1235128512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432976 (or 6432966 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 1235128512 is about 35144.3951719189. The cubic root of 1235128512 is about 1072.9283374457.

The spelling of 1235128512 in words is "one billion, two hundred thirty-five million, one hundred twenty-eight thousand, five hundred twelve".