12302821 has 2 divisors, whose sum is σ = 12302822. Its totient is φ = 12302820.

The previous prime is 12302813. The next prime is 12302831. The reversal of 12302821 is 12820321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11826721 + 476100 = 3439^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 12302821 - 2³ = 12302813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12302831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6151410 + 6151411.

It is an arithmetic number, because the mean of its divisors is an integer number (6151411).

Almost surely, 2^12302821 is an apocalyptic number.

It is an amenable number.

12302821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12302821 is an equidigital number, since it uses as much as digits as its factorization.

12302821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 12302821 is about 3507.5377403529. The cubic root of 12302821 is about 230.8526699327.

The spelling of 12302821 in words is "twelve million, three hundred two thousand, eight hundred twenty-one".