12720229 has 2 divisors, whose sum is σ = 12720230. Its totient is φ = 12720228.

The previous prime is 12720187. The next prime is 12720247. The reversal of 12720229 is 92202721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 1896129 = 3290^2 + 1377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12720229 is a prime.

It is equal to p₈₃₂₁₉₂ and since 12720229 and 832192 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12720529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360114 + 6360115.

It is an arithmetic number, because the mean of its divisors is an integer number (6360115).

Almost surely, 2^12720229 is an apocalyptic number.

It is an amenable number.

12720229 is a deficient number, since it is larger than the sum of its proper divisors (1).

12720229 is an equidigital number, since it uses as much as digits as its factorization.

12720229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12720229 is about 3566.5430040867. The cubic root of 12720229 is about 233.4344647780.

The spelling of 12720229 in words is "twelve million, seven hundred twenty thousand, two hundred twenty-nine".