12661629 has 4 divisors (see below), whose sum is σ = 16882176. Its totient is φ = 8441084.

The previous prime is 12661613. The next prime is 12661633. The reversal of 12661629 is 92616621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12661629 - 2⁴ = 12661613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12661629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661669) 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 3 ways as a sum of consecutive naturals, for example, 2110269 + ... + 2110274.

It is an arithmetic number, because the mean of its divisors is an integer number (4220544).

Almost surely, 2^12661629 is an apocalyptic number.

It is an amenable number.

12661629 is a deficient number, since it is larger than the sum of its proper divisors (4220547).

12661629 is an equidigital number, since it uses as much as digits as its factorization.

12661629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220546.

The product of its digits is 7776, while the sum is 33.

The square root of 12661629 is about 3558.3182825599. The cubic root of 12661629 is about 233.0754481912.

The spelling of 12661629 in words is "twelve million, six hundred sixty-one thousand, six hundred twenty-nine".