12670621 has 2 divisors, whose sum is σ = 12670622. Its totient is φ = 12670620.

The previous prime is 12670607. The next prime is 12670639. The reversal of 12670621 is 12607621.

12670621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 68121 = 3550^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 12670621 - 2¹⁹ = 12146333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12670421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6335310 + 6335311.

It is an arithmetic number, because the mean of its divisors is an integer number (6335311).

Almost surely, 2^12670621 is an apocalyptic number.

It is an amenable number.

12670621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12670621 is an equidigital number, since it uses as much as digits as its factorization.

12670621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12670621 is about 3559.5815765340. The cubic root of 12670621 is about 233.1306100900.

The spelling of 12670621 in words is "twelve million, six hundred seventy thousand, six hundred twenty-one".