Base | Representation |
---|---|
bin | 101000001010… |
… | …0010010001001 |
3 | 1110121200111001 |
4 | 1100110102021 |
5 | 20342221401 |
6 | 2031135001 |
7 | 343650451 |
oct | 120242211 |
9 | 43550431 |
10 | 21054601 |
11 | 109806a7 |
12 | 7074461 |
13 | 4492459 |
14 | 2b20d61 |
15 | 1cad601 |
hex | 1414489 |
21054601 has 2 divisors, whose sum is σ = 21054602. Its totient is φ = 21054600.
The previous prime is 21054569. The next prime is 21054613. The reversal of 21054601 is 10645012.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 16192576 + 4862025 = 4024^2 + 2205^2 .
It is a cyclic number.
It is not a de Polignac number, because 21054601 - 25 = 21054569 is a prime.
It is not a weakly prime, because it can be changed into another prime (21054661) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10527300 + 10527301.
It is an arithmetic number, because the mean of its divisors is an integer number (10527301).
Almost surely, 221054601 is an apocalyptic number.
It is an amenable number.
21054601 is a deficient number, since it is larger than the sum of its proper divisors (1).
21054601 is an equidigital number, since it uses as much as digits as its factorization.
21054601 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 240, while the sum is 19.
The square root of 21054601 is about 4588.5292850760. The cubic root of 21054601 is about 276.1313218447.
Adding to 21054601 its reverse (10645012), we get a palindrome (31699613).
The spelling of 21054601 in words is "twenty-one million, fifty-four thousand, six hundred one".
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