Base | Representation |
---|---|
bin | 101010001001101011100 |
3 | 2121011200000 |
4 | 11101031130 |
5 | 323144322 |
6 | 45334300 |
7 | 14511600 |
oct | 5211534 |
9 | 2534600 |
10 | 1381212 |
11 | 8637a8 |
12 | 567390 |
13 | 3948b1 |
14 | 27d500 |
15 | 1c43ac |
hex | 15135c |
1381212 has 108 divisors (see below), whose sum is σ = 4357080. Its totient is φ = 381024.
The previous prime is 1381207. The next prime is 1381213. The reversal of 1381212 is 2121831.
It is a tau number, because it is divible by the number of its divisors (108).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1381213) by changing a digit.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47614 + ... + 47642.
21381212 is an apocalyptic number.
1381212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
1381212 is the 588-th decagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1381212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2178540).
1381212 is an abundant number, since it is smaller than the sum of its proper divisors (2975868).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1381212 is a wasteful number, since it uses less digits than its factorization.
1381212 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 62 (or 41 counting only the distinct ones).
The product of its digits is 96, while the sum is 18.
The square root of 1381212 is about 1175.2497606892. The cubic root of 1381212 is about 111.3662119380.
It can be divided in two parts, 13812 and 12, that added together give a cube (13824 = 243).
The spelling of 1381212 in words is "one million, three hundred eighty-one thousand, two hundred twelve".
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