Base | Representation |
---|---|
bin | 110001011100110111101 |
3 | 10001022210022 |
4 | 12023212331 |
5 | 403323123 |
6 | 54421525 |
7 | 16526144 |
oct | 6134675 |
9 | 3038708 |
10 | 1620413 |
11 | a07493 |
12 | 6618a5 |
13 | 449732 |
14 | 30275b |
15 | 2201c8 |
hex | 18b9bd |
1620413 has 2 divisors, whose sum is σ = 1620414. Its totient is φ = 1620412.
The previous prime is 1620403. The next prime is 1620431. The reversal of 1620413 is 3140261.
Together with next prime (1620431) it forms an Ormiston pair, because they use the same digits, order apart.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1162084 + 458329 = 1078^2 + 677^2 .
It is a cyclic number.
It is not a de Polignac number, because 1620413 - 216 = 1554877 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 1620391 and 1620400.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1620403) 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, 810206 + 810207.
It is an arithmetic number, because the mean of its divisors is an integer number (810207).
21620413 is an apocalyptic number.
It is an amenable number.
1620413 is a deficient number, since it is larger than the sum of its proper divisors (1).
1620413 is an equidigital number, since it uses as much as digits as its factorization.
1620413 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 144, while the sum is 17.
The square root of 1620413 is about 1272.9544375193. The cubic root of 1620413 is about 117.4560088829.
Adding to 1620413 its reverse (3140261), we get a palindrome (4760674).
The spelling of 1620413 in words is "one million, six hundred twenty thousand, four hundred thirteen".
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