Base | Representation |
---|---|
bin | 10100001011000010100 |
3 | 1020120201221 |
4 | 2201120110 |
5 | 132123022 |
6 | 22100124 |
7 | 5422102 |
oct | 2413024 |
9 | 1216657 |
10 | 661012 |
11 | 4116a0 |
12 | 27a644 |
13 | 1a1b41 |
14 | 132c72 |
15 | d0cc7 |
hex | a1614 |
661012 has 24 divisors (see below), whose sum is σ = 1284192. Its totient is φ = 295200.
The previous prime is 661009. The next prime is 661019. The reversal of 661012 is 210166.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (661019) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3562 + ... + 3742.
It is an arithmetic number, because the mean of its divisors is an integer number (53508).
2661012 is an apocalyptic number.
661012 is the 664-th pentagonal number.
It is an amenable number.
661012 is a deficient number, since it is larger than the sum of its proper divisors (623180).
661012 is a wasteful number, since it uses less digits than its factorization.
661012 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 279 (or 277 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 16.
The square root of 661012 is about 813.0264448344. The cubic root of 661012 is about 87.1103545236.
Adding to 661012 its reverse (210166), we get a palindrome (871178).
The spelling of 661012 in words is "six hundred sixty-one thousand, twelve".
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