Base | Representation |
---|---|
bin | 110001100001… |
… | …001111000000 |
3 | 220102111211121 |
4 | 301201033000 |
5 | 11310344214 |
6 | 1142122024 |
7 | 215224006 |
oct | 61411700 |
9 | 26374747 |
10 | 12981184 |
11 | 7366a57 |
12 | 4420314 |
13 | 28c6798 |
14 | 1a1ca76 |
15 | 1216424 |
hex | c613c0 |
12981184 has 56 divisors (see below), whose sum is σ = 27157680. Its totient is φ = 6150144.
The previous prime is 12981181. The next prime is 12981187. The reversal of 12981184 is 48118921.
It is an interprime number because it is at equal distance from previous prime (12981181) and next prime (12981187).
It is a super-2 number, since 2×129811842 = 337022276083712, which contains 22 as substring.
It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12981181) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145812 + ... + 145900.
Almost surely, 212981184 is an apocalyptic number.
12981184 is the 2279-th heptagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12981184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13578840).
12981184 is an abundant number, since it is smaller than the sum of its proper divisors (14176496).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12981184 is an equidigital number, since it uses as much as digits as its factorization.
12981184 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 197 (or 187 counting only the distinct ones).
The product of its digits is 4608, while the sum is 34.
The square root of 12981184 is about 3602.9410208884. The cubic root of 12981184 is about 235.0199711411.
The spelling of 12981184 in words is "twelve million, nine hundred eighty-one thousand, one hundred eighty-four".
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