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12722 = 26361
BaseRepresentation
bin11000110110010
3122110012
43012302
5401342
6134522
752043
oct30662
918405
1012722
119616
127442
135a38
1448ca
153b82
hex31b2

12722 has 4 divisors (see below), whose sum is σ = 19086. Its totient is φ = 6360.

The previous prime is 12721. The next prime is 12739. The reversal of 12722 is 22721.

12722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 + 841 = 109^2 + 29^2 .

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 12697 and 12706.

It is not an unprimeable number, because it can be changed into a prime (12721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3179 + ... + 3182.

212722 is an apocalyptic number.

12722 is a deficient number, since it is larger than the sum of its proper divisors (6364).

12722 is an equidigital number, since it uses as much as digits as its factorization.

12722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363.

The product of its digits is 56, while the sum is 14.

The square root of 12722 is about 112.7918436767. The cubic root of 12722 is about 23.3445297739.

Subtracting 12722 from its reverse (22721), we obtain a palindrome (9999).

The spelling of 12722 in words is "twelve thousand, seven hundred twenty-two", and thus it is an iban number.

Divisors: 1 2 6361 12722