12651 has 4 divisors (see below), whose sum is σ = 16872. Its totient is φ = 8432.

The previous prime is 12647. The next prime is 12653. The reversal of 12651 is 15621.

12651 is digitally balanced in base 3, 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 is a cyclic number.

It is not a de Polignac number, because 12651 - 2² = 12647 is a prime.

It is a D-number.

12651 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 12651.

It is not an unprimeable number, because it can be changed into a prime (12653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2106 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (4218).

2¹²⁶⁵¹ is an apocalyptic number.

12651 is a deficient number, since it is larger than the sum of its proper divisors (4221).

12651 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 7 representation: 12651 = (51612)₇.

12651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220.

The product of its digits is 60, while the sum is 15.

The square root of 12651 is about 112.4766642464. The cubic root of 12651 is about 23.3010210338.

The spelling of 12651 in words is "twelve thousand, six hundred fifty-one".