Base | Representation |
---|---|
bin | 1111001011100… |
… | …11001000100001 |
3 | 22212122000101001 |
4 | 13211303020201 |
5 | 230100134111 |
6 | 20345312001 |
7 | 3104310463 |
oct | 745631041 |
9 | 285560331 |
10 | 127349281 |
11 | 65981444 |
12 | 36795601 |
13 | 204cb107 |
14 | 12cb0133 |
15 | b2a81c1 |
hex | 7973221 |
127349281 has 2 divisors, whose sum is σ = 127349282. Its totient is φ = 127349280.
The previous prime is 127349249. The next prime is 127349351. The reversal of 127349281 is 182943721.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 107848225 + 19501056 = 10385^2 + 4416^2 .
It is an emirp because it is prime and its reverse (182943721) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 127349281 - 25 = 127349249 is a prime.
It is a super-2 number, since 2×1273492812 = 32435678742433922, which contains 22 as substring.
It is a Chen prime.
It is a self number, because there is not a number n which added to its sum of digits gives 127349281.
It is not a weakly prime, because it can be changed into another prime (127349681) 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 as a sum of consecutive naturals, namely, 63674640 + 63674641.
It is an arithmetic number, because the mean of its divisors is an integer number (63674641).
Almost surely, 2127349281 is an apocalyptic number.
It is an amenable number.
127349281 is a deficient number, since it is larger than the sum of its proper divisors (1).
127349281 is an equidigital number, since it uses as much as digits as its factorization.
127349281 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 24192, while the sum is 37.
The square root of 127349281 is about 11284.9138676376. The cubic root of 127349281 is about 503.1129534865.
The spelling of 127349281 in words is "one hundred twenty-seven million, three hundred forty-nine thousand, two hundred eighty-one".
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