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12842 = 26421
BaseRepresentation
bin11001000101010
3122121122
43020222
5402332
6135242
752304
oct31052
918548
1012842
119715
127522
135acb
144974
153c12
hex322a

12842 has 4 divisors (see below), whose sum is σ = 19266. Its totient is φ = 6420.

The previous prime is 12841. The next prime is 12853. The reversal of 12842 is 24821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11881 + 961 = 109^2 + 31^2 .

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 12842.

It is not an unprimeable number, because it can be changed into a prime (12841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209 + ... + 3212.

212842 is an apocalyptic number.

12842 is a deficient number, since it is larger than the sum of its proper divisors (6424).

12842 is an equidigital number, since it uses as much as digits as its factorization.

12842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6423.

The product of its digits is 128, while the sum is 17.

The square root of 12842 is about 113.3225485065. The cubic root of 12842 is about 23.4176991280.

The spelling of 12842 in words is "twelve thousand, eight hundred forty-two".

Divisors: 1 2 6421 12842