12265921 has 2 divisors, whose sum is σ = 12265922. Its totient is φ = 12265920.

The previous prime is 12265901. The next prime is 12265943. The reversal of 12265921 is 12956221.

12265921 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., 8042896 + 4223025 = 2836^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 12265921 - 2¹⁹ = 11741633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12265921.

It is not a weakly prime, because it can be changed into another prime (12265901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6132960 + 6132961.

It is an arithmetic number, because the mean of its divisors is an integer number (6132961).

Almost surely, 2^12265921 is an apocalyptic number.

It is an amenable number.

12265921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12265921 is an equidigital number, since it uses as much as digits as its factorization.

12265921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 12265921 is about 3502.2736900477. The cubic root of 12265921 is about 230.6216390645.

The spelling of 12265921 in words is "twelve million, two hundred sixty-five thousand, nine hundred twenty-one".