Base | Representation |
---|---|
bin | 11111000111111… |
… | …11111100000100 |
3 | 200012022000020120 |
4 | 33203333330010 |
5 | 1013320021142 |
6 | 41524101540 |
7 | 6320162262 |
oct | 1743777404 |
9 | 605260216 |
10 | 261095172 |
11 | 124421738 |
12 | 735348b0 |
13 | 421288b0 |
14 | 26967432 |
15 | 17dc67ec |
hex | f8fff04 |
261095172 has 96 divisors (see below), whose sum is σ = 698035968. Its totient is φ = 75339264.
The previous prime is 261095171. The next prime is 261095203. The reversal of 261095172 is 271590162.
It is not an unprimeable number, because it can be changed into a prime (261095171) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189478 + ... + 190850.
It is an arithmetic number, because the mean of its divisors is an integer number (7271208).
Almost surely, 2261095172 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 261095172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349017984).
261095172 is an abundant number, since it is smaller than the sum of its proper divisors (436940796).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
261095172 is a wasteful number, since it uses less digits than its factorization.
261095172 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1469 (or 1467 counting only the distinct ones).
The product of its (nonzero) digits is 7560, while the sum is 33.
The square root of 261095172 is about 16158.4396523922. The cubic root of 261095172 is about 639.1453207268.
The spelling of 261095172 in words is "two hundred sixty-one million, ninety-five thousand, one hundred seventy-two".
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