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12823021 is a prime number
BaseRepresentation
bin110000111010…
…100111101101
3220010110212201
4300322213231
511240314041
61134501501
7213664621
oct60724755
926113781
1012823021
117269142
124364891
13286c7b3
1419bb181
1511d4631
hexc3a9ed

12823021 has 2 divisors, whose sum is σ = 12823022. Its totient is φ = 12823020.

The previous prime is 12823009. The next prime is 12823033. The reversal of 12823021 is 12032821.

12823021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12823009) and next prime (12823033).

It can be written as a sum of positive squares in only one way, i.e., 11634921 + 1188100 = 3411^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 12823021 - 25 = 12822989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12823021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12823051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6411510 + 6411511.

It is an arithmetic number, because the mean of its divisors is an integer number (6411511).

Almost surely, 212823021 is an apocalyptic number.

It is an amenable number.

12823021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12823021 is an equidigital number, since it uses as much as digits as its factorization.

12823021 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 12823021 is about 3580.9246012727. The cubic root of 12823021 is about 234.0615721771.

Adding to 12823021 its reverse (12032821), we get a palindrome (24855842).

The spelling of 12823021 in words is "twelve million, eight hundred twenty-three thousand, twenty-one".