1230512985 has 32 divisors (see below), whose sum is σ = 2355857280. Its totient is φ = 605790144.

The previous prime is 1230512981. The next prime is 1230512993. The reversal of 1230512985 is 5892150321.

It is not a de Polignac number, because 1230512985 - 2² = 1230512981 is a prime.

It is a super-2 number, since 2×1230512985² = 3028324412507220450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1230512981) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 348819 + ... + 352328.

It is an arithmetic number, because the mean of its divisors is an integer number (73620540).

Almost surely, 2^1230512985 is an apocalyptic number.

1230512985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1230512985 is a deficient number, since it is larger than the sum of its proper divisors (1125344295).

1230512985 is a wasteful number, since it uses less digits than its factorization.

1230512985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701174 (or 701168 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1230512985 is about 35078.6685180609. The cubic root of 1230512985 is about 1071.5902011019.

The spelling of 1230512985 in words is "one billion, two hundred thirty million, five hundred twelve thousand, nine hundred eighty-five".