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12860221 = 111916121
BaseRepresentation
bin110001000011…
…101100111101
3220012100220111
4301003230331
511243011341
61135350021
7214211233
oct61035475
926170814
1012860221
117294090
124382311
1328836ca
1419ca953
1511e0681
hexc43b3d

12860221 has 8 divisors (see below), whose sum is σ = 14105088. Its totient is φ = 11628000.

The previous prime is 12860219. The next prime is 12860227. The reversal of 12860221 is 12206821.

12860221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12860221 - 21 = 12860219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12860192 and 12860201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12860227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (1763136).

Almost surely, 212860221 is an apocalyptic number.

12860221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12860221 is a deficient number, since it is larger than the sum of its proper divisors (1244867).

12860221 is a wasteful number, since it uses less digits than its factorization.

12860221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 12860221 is about 3586.1150288299. The cubic root of 12860221 is about 234.2876937278.

The spelling of 12860221 in words is "twelve million, eight hundred sixty thousand, two hundred twenty-one".

Divisors: 1 11 191 2101 6121 67331 1169111 12860221