12047621 has 2 divisors, whose sum is σ = 12047622. Its totient is φ = 12047620.

The previous prime is 12047617. The next prime is 12047627. The reversal of 12047621 is 12674021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11826721 + 220900 = 3439^2 + 470^2 .

It is an emirp because it is prime and its reverse (12674021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12047621 - 2² = 12047617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12047627) 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 as a sum of consecutive naturals, namely, 6023810 + 6023811.

It is an arithmetic number, because the mean of its divisors is an integer number (6023811).

Almost surely, 2^12047621 is an apocalyptic number.

It is an amenable number.

12047621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12047621 is an equidigital number, since it uses as much as digits as its factorization.

12047621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 12047621 is about 3470.9683087000. The cubic root of 12047621 is about 229.2452956559.

The spelling of 12047621 in words is "twelve million, forty-seven thousand, six hundred twenty-one".