| Base | Representation |
|---|---|
| bin | 100101101110111… |
| … | …1101101000010100 |
| 3 | 10021020110212112100 |
| 4 | 1023131331220110 |
| 5 | 10043113131222 |
| 6 | 325345522100 |
| 7 | 43243030131 |
| oct | 11335755024 |
| 9 | 3236425470 |
| 10 | 1266145812 |
| 11 | 59a7850a8 |
| 12 | 2b4043330 |
| 13 | 172413909 |
| 14 | c022b588 |
| 15 | 762544ac |
| hex | 4b77da14 |
1266145812 has 18 divisors (see below), whose sum is σ = 3200535338. Its totient is φ = 422048592.
The previous prime is 1266145789. The next prime is 1266145847. The reversal of 1266145812 is 2185416621.
It is a happy number.
1266145812 is a `hidden beast` number, since 1 + 2 + 66 + 14 + 581 + 2 = 666.
It can be written as a sum of positive squares in only one way, i.e., 894967056 + 371178756 = 29916^2 + 19266^2 .
It is a tau number, because it is divible by the number of its divisors (18).
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 35170717 = 1266145812 / (1 + 2 + 6 + 6 + 1 + 4 + 5 + 8 + 1 + 2).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17585323 + ... + 17585394.
Almost surely, 21266145812 is an apocalyptic number.
1266145812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
1266145812 is an abundant number, since it is smaller than the sum of its proper divisors (1934389526).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1266145812 is a wasteful number, since it uses less digits than its factorization.
1266145812 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 35170727 (or 35170722 counting only the distinct ones).
The product of its digits is 23040, while the sum is 36.
The square root of 1266145812 is about 35582.9427113610. The cubic root of 1266145812 is about 1081.8355308908.
The spelling of 1266145812 in words is "one billion, two hundred sixty-six million, one hundred forty-five thousand, eight hundred twelve".
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