Base | Representation |
---|---|
bin | 100011110011110… |
… | …1000100101000001 |
3 | 10002201222012010122 |
4 | 1013213220211001 |
5 | 4430100302121 |
6 | 315121510025 |
7 | 41530123556 |
oct | 10747504501 |
9 | 3081865118 |
10 | 1201572161 |
11 | 56728aa49 |
12 | 2964a2315 |
13 | 161c24c5a |
14 | b581ca2d |
15 | 7074b5ab |
hex | 479e8941 |
1201572161 has 2 divisors, whose sum is σ = 1201572162. Its totient is φ = 1201572160.
The previous prime is 1201572139. The next prime is 1201572191. The reversal of 1201572161 is 1612751021.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 613800625 + 587771536 = 24775^2 + 24244^2 .
It is a cyclic number.
It is not a de Polignac number, because 1201572161 - 214 = 1201555777 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 1201572161.
It is not a weakly prime, because it can be changed into another prime (1201572101) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600786080 + 600786081.
It is an arithmetic number, because the mean of its divisors is an integer number (600786081).
Almost surely, 21201572161 is an apocalyptic number.
It is an amenable number.
1201572161 is a deficient number, since it is larger than the sum of its proper divisors (1).
1201572161 is an equidigital number, since it uses as much as digits as its factorization.
1201572161 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 840, while the sum is 26.
The square root of 1201572161 is about 34663.7009132031. The cubic root of 1201572161 is about 1063.1224417628.
The spelling of 1201572161 in words is "one billion, two hundred one million, five hundred seventy-two thousand, one hundred sixty-one".
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