12621149 has 4 divisors (see below), whose sum is σ = 13285440. Its totient is φ = 11956860.

The previous prime is 12621143. The next prime is 12621151. The reversal of 12621149 is 94112621.

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 12621149 - 2²⁰ = 11572573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332117 + ... + 332154.

It is an arithmetic number, because the mean of its divisors is an integer number (3321360).

Almost surely, 2^12621149 is an apocalyptic number.

12621149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12621149 is a deficient number, since it is larger than the sum of its proper divisors (664291).

12621149 is an equidigital number, since it uses as much as digits as its factorization.

12621149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664290.

The product of its digits is 864, while the sum is 26.

The square root of 12621149 is about 3552.6256487280. The cubic root of 12621149 is about 232.8267975454.

The spelling of 12621149 in words is "twelve million, six hundred twenty-one thousand, one hundred forty-nine".