12889512 has 24 divisors (see below), whose sum is σ = 34909290. Its totient is φ = 4296480.

The previous prime is 12889507. The next prime is 12889517. The reversal of 12889512 is 21598821.

It is an interprime number because it is at equal distance from previous prime (12889507) and next prime (12889517).

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 820836 = 3474^2 + 906^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×12889512² = 332279039196288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12889517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89439 + ... + 89582.

Almost surely, 2^12889512 is an apocalyptic number.

12889512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12889512 is an abundant number, since it is smaller than the sum of its proper divisors (22019778).

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

12889512 is a wasteful number, since it uses less digits than its factorization.

12889512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179033 (or 179026 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 12889512 is about 3590.1966519955. The cubic root of 12889512 is about 234.4654334751.

The spelling of 12889512 in words is "twelve million, eight hundred eighty-nine thousand, five hundred twelve".