Base | Representation |
---|---|
bin | 1000101100001… |
… | …00101010010001 |
3 | 12002011110022022 |
4 | 10112010222101 |
5 | 122130120441 |
6 | 11122221225 |
7 | 1543412135 |
oct | 426045221 |
9 | 162143268 |
10 | 72895121 |
11 | 38169202 |
12 | 204b4815 |
13 | 12143510 |
14 | 99773c5 |
15 | 65ed84b |
hex | 4584a91 |
72895121 has 8 divisors (see below), whose sum is σ = 79031400. Its totient is φ = 66834432.
The previous prime is 72895111. The next prime is 72895139. The reversal of 72895121 is 12159827.
It can be written as a sum of positive squares in 4 ways, for example, as 1661521 + 71233600 = 1289^2 + 8440^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 72895121 - 226 = 5786257 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (72895111) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16880 + ... + 20753.
It is an arithmetic number, because the mean of its divisors is an integer number (9878925).
Almost surely, 272895121 is an apocalyptic number.
It is an amenable number.
72895121 is a deficient number, since it is larger than the sum of its proper divisors (6136279).
72895121 is a wasteful number, since it uses less digits than its factorization.
72895121 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 37795.
The product of its digits is 10080, while the sum is 35.
The square root of 72895121 is about 8537.8639600312. The cubic root of 72895121 is about 417.7336753473.
The spelling of 72895121 in words is "seventy-two million, eight hundred ninety-five thousand, one hundred twenty-one".
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