12025421 has 2 divisors, whose sum is σ = 12025422. Its totient is φ = 12025420.

The previous prime is 12025417. The next prime is 12025441. The reversal of 12025421 is 12452021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9084196 + 2941225 = 3014^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 12025421 - 2² = 12025417 is a prime.

It is a super-2 number, since 2×12025421² = 289221500454482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12025421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12025411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6012710 + 6012711.

It is an arithmetic number, because the mean of its divisors is an integer number (6012711).

Almost surely, 2^12025421 is an apocalyptic number.

It is an amenable number.

12025421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12025421 is an equidigital number, since it uses as much as digits as its factorization.

12025421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12025421 is about 3467.7688792652. The cubic root of 12025421 is about 229.1043999352.

Adding to 12025421 its reverse (12452021), we get a palindrome (24477442).

The spelling of 12025421 in words is "twelve million, twenty-five thousand, four hundred twenty-one".