12820061 has 2 divisors, whose sum is σ = 12820062. Its totient is φ = 12820060.

The previous prime is 12820043. The next prime is 12820099. The reversal of 12820061 is 16002821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 4923961 = 2810^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 12820061 - 2¹⁴ = 12803677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12820961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410030 + 6410031.

It is an arithmetic number, because the mean of its divisors is an integer number (6410031).

Almost surely, 2^12820061 is an apocalyptic number.

It is an amenable number.

12820061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12820061 is an equidigital number, since it uses as much as digits as its factorization.

12820061 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 20.

The square root of 12820061 is about 3580.5112763403. The cubic root of 12820061 is about 234.0435609360.

Adding to 12820061 its reverse (16002821), we get a palindrome (28822882).

The spelling of 12820061 in words is "twelve million, eight hundred twenty thousand, sixty-one".