Base | Representation |
---|---|
bin | 101000110110… |
… | …1110011011100 |
3 | 1111022022110121 |
4 | 1101231303130 |
5 | 20440440101 |
6 | 2043044324 |
7 | 350035462 |
oct | 121556334 |
9 | 44268417 |
10 | 21421276 |
11 | 11101138 |
12 | 72106a4 |
13 | 4590316 |
14 | 2bb8832 |
15 | 1d320a1 |
hex | 146dcdc |
21421276 has 6 divisors (see below), whose sum is σ = 37487240. Its totient is φ = 10710636.
The previous prime is 21421273. The next prime is 21421319. The reversal of 21421276 is 67212412.
It is a self number, because there is not a number n which added to its sum of digits gives 21421276.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21421273) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2677656 + ... + 2677663.
Almost surely, 221421276 is an apocalyptic number.
It is an amenable number.
21421276 is a deficient number, since it is larger than the sum of its proper divisors (16065964).
21421276 is a wasteful number, since it uses less digits than its factorization.
21421276 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5355323 (or 5355321 counting only the distinct ones).
The product of its digits is 1344, while the sum is 25.
The square root of 21421276 is about 4628.3124354348. The cubic root of 21421276 is about 277.7250875113.
Adding to 21421276 its reverse (67212412), we get a palindrome (88633688).
The spelling of 21421276 in words is "twenty-one million, four hundred twenty-one thousand, two hundred seventy-six".
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