Base | Representation |
---|---|
bin | 110011010010… |
… | …011110011101 |
3 | 221022002002202 |
4 | 303102132131 |
5 | 11420220041 |
6 | 1200101245 |
7 | 222165212 |
oct | 63223635 |
9 | 27262082 |
10 | 13445021 |
11 | 7653497 |
12 | 4604825 |
13 | 2a29945 |
14 | 1addb09 |
15 | 12a8a9b |
hex | cd279d |
13445021 has 2 divisors, whose sum is σ = 13445022. Its totient is φ = 13445020.
The previous prime is 13445017. The next prime is 13445039. The reversal of 13445021 is 12054431.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 10329796 + 3115225 = 3214^2 + 1765^2 .
It is an emirp because it is prime and its reverse (12054431) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 13445021 - 22 = 13445017 is a prime.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 13444984 and 13445002.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (13445321) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722510 + 6722511.
It is an arithmetic number, because the mean of its divisors is an integer number (6722511).
Almost surely, 213445021 is an apocalyptic number.
It is an amenable number.
13445021 is a deficient number, since it is larger than the sum of its proper divisors (1).
13445021 is an equidigital number, since it uses as much as digits as its factorization.
13445021 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 480, while the sum is 20.
The square root of 13445021 is about 3666.7452870359. The cubic root of 13445021 is about 237.7864819958.
Adding to 13445021 its reverse (12054431), we get a palindrome (25499452).
The spelling of 13445021 in words is "thirteen million, four hundred forty-five thousand, twenty-one".
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