| Base | Representation |
|---|---|
| bin | 110000010011… |
| … | …001111101100 |
| 3 | 212211021122100 |
| 4 | 300103033230 |
| 5 | 11220133430 |
| 6 | 1131215100 |
| 7 | 212423460 |
| oct | 60231754 |
| 9 | 25737570 |
| 10 | 12661740 |
| 11 | 7168a53 |
| 12 | 42a7490 |
| 13 | 2814270 |
| 14 | 19784a0 |
| 15 | 11a1960 |
| hex | c133ec |
12661740 has 144 divisors (see below), whose sum is σ = 47331648. Its totient is φ = 2668032.
The previous prime is 12661739. The next prime is 12661741. The reversal of 12661740 is 4716621.
12661740 is a `hidden beast` number, since 1 + 2 + 6 + 617 + 40 = 666.
12661740 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (12661739) and next prime (12661741).
12661740 is strictly pandigital in base 8.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12661741) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15994 + ... + 16766.
It is an arithmetic number, because the mean of its divisors is an integer number (328692).
Almost surely, 212661740 is an apocalyptic number.
12661740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12661740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23665824).
12661740 is an abundant number, since it is smaller than the sum of its proper divisors (34669908).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12661740 is a wasteful number, since it uses less digits than its factorization.
12661740 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 808 (or 803 counting only the distinct ones).
The product of its (nonzero) digits is 2016, while the sum is 27.
The square root of 12661740 is about 3558.3338797814. Note that the first 3 decimals coincide. The cubic root of 12661740 is about 233.0761292858.
The spelling of 12661740 in words is "twelve million, six hundred sixty-one thousand, seven hundred forty".
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