12250621 has 2 divisors, whose sum is σ = 12250622. Its totient is φ = 12250620.

The previous prime is 12250613. The next prime is 12250627. The reversal of 12250621 is 12605221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11628100 + 622521 = 3410^2 + 789^2 .

It is an emirp because it is prime and its reverse (12605221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12250621 - 2³ = 12250613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12250627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6125310 + 6125311.

It is an arithmetic number, because the mean of its divisors is an integer number (6125311).

Almost surely, 2^12250621 is an apocalyptic number.

It is an amenable number.

12250621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12250621 is an equidigital number, since it uses as much as digits as its factorization.

12250621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 12250621 is about 3500.0887131614. The cubic root of 12250621 is about 230.5257098853.

Adding to 12250621 its reverse (12605221), we get a palindrome (24855842).

The spelling of 12250621 in words is "twelve million, two hundred fifty thousand, six hundred twenty-one".