12852421 has 2 divisors, whose sum is σ = 12852422. Its totient is φ = 12852420.

The previous prime is 12852419. The next prime is 12852473. The reversal of 12852421 is 12425821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12852225 + 196 = 3585^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 12852421 - 2¹ = 12852419 is a prime.

It is a super-2 number, since 2×12852421² = 330369451122482, which contains 22 as substring.

Together with 12852419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12852121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6426210 + 6426211.

It is an arithmetic number, because the mean of its divisors is an integer number (6426211).

Almost surely, 2^12852421 is an apocalyptic number.

It is an amenable number.

12852421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12852421 is an equidigital number, since it uses as much as digits as its factorization.

12852421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 25.

The square root of 12852421 is about 3585.0273360185. The cubic root of 12852421 is about 234.2403173103.

The spelling of 12852421 in words is "twelve million, eight hundred fifty-two thousand, four hundred twenty-one".