Base | Representation |
---|---|
bin | 110000110101… |
… | …000110010111 |
3 | 220002022212011 |
4 | 300311012113 |
5 | 11234103112 |
6 | 1134205051 |
7 | 213541654 |
oct | 60650627 |
9 | 26068764 |
10 | 12800407 |
11 | 7253154 |
12 | 4353787 |
13 | 2862409 |
14 | 19b2c2b |
15 | 11ccaa7 |
hex | c35197 |
12800407 has 2 divisors, whose sum is σ = 12800408. Its totient is φ = 12800406.
The previous prime is 12800387. The next prime is 12800419. The reversal of 12800407 is 70400821.
12800407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is an emirp because it is prime and its reverse (70400821) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12800407 - 27 = 12800279 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12800467) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6400203 + 6400204.
It is an arithmetic number, because the mean of its divisors is an integer number (6400204).
Almost surely, 212800407 is an apocalyptic number.
12800407 is a deficient number, since it is larger than the sum of its proper divisors (1).
12800407 is an equidigital number, since it uses as much as digits as its factorization.
12800407 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 448, while the sum is 22.
The square root of 12800407 is about 3577.7656435267. The cubic root of 12800407 is about 233.9238983541.
The spelling of 12800407 in words is "twelve million, eight hundred thousand, four hundred seven".
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