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12621 = 37601
BaseRepresentation
bin11000101001101
3122022110
43011031
5400441
6134233
751540
oct30515
918273
1012621
119534
127379
13598b
144857
153b16
hex314d

12621 has 8 divisors (see below), whose sum is σ = 19264. Its totient is φ = 7200.

The previous prime is 12619. The next prime is 12637.

12621 is nontrivially palindromic in base 10.

12621 is digitally balanced in base 2, 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 not a de Polignac number, because 12621 - 21 = 12619 is a prime.

It is a Curzon number.

12621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 12597 and 12606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12601) 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 in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 321.

It is an arithmetic number, because the mean of its divisors is an integer number (2408).

212621 is an apocalyptic number.

It is an amenable number.

12621 is a deficient number, since it is larger than the sum of its proper divisors (6643).

12621 is an equidigital number, since it uses as much as digits as its factorization.

12621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its digits is 24, while the sum is 12.

The square root of 12621 is about 112.3432240947. The cubic root of 12621 is about 23.2825881323.

The spelling of 12621 in words is "twelve thousand, six hundred twenty-one".

Divisors: 1 3 7 21 601 1803 4207 12621