12720073 has 2 divisors, whose sum is σ = 12720074. Its totient is φ = 12720072.

The previous prime is 12720061. The next prime is 12720077. The reversal of 12720073 is 37002721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12588304 + 131769 = 3548^2 + 363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12720073 is a prime.

It is a super-3 number, since 3×12720073³ (a number of 22 digits) contains 333 as substring.

It is equal to p₈₃₂₁₈₀ and since 12720073 and 832180 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12720077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360036 + 6360037.

It is an arithmetic number, because the mean of its divisors is an integer number (6360037).

Almost surely, 2^12720073 is an apocalyptic number.

It is an amenable number.

12720073 is a deficient number, since it is larger than the sum of its proper divisors (1).

12720073 is an equidigital number, since it uses as much as digits as its factorization.

12720073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 12720073 is about 3566.5211341025. The cubic root of 12720073 is about 233.4335104995.

Adding to 12720073 its reverse (37002721), we get a palindrome (49722794).

The spelling of 12720073 in words is "twelve million, seven hundred twenty thousand, seventy-three".