12620417 has 2 divisors, whose sum is σ = 12620418. Its totient is φ = 12620416.

The previous prime is 12620407. The next prime is 12620437. The reversal of 12620417 is 71402621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12609601 + 10816 = 3551^2 + 104^2 .

It is an emirp because it is prime and its reverse (71402621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12620417 - 2⁴ = 12620401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12620392 and 12620401.

It is not a weakly prime, because it can be changed into another prime (12620407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310208 + 6310209.

It is an arithmetic number, because the mean of its divisors is an integer number (6310209).

Almost surely, 2^12620417 is an apocalyptic number.

It is an amenable number.

12620417 is a deficient number, since it is larger than the sum of its proper divisors (1).

12620417 is an equidigital number, since it uses as much as digits as its factorization.

12620417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 12620417 is about 3552.5226248400. The cubic root of 12620417 is about 232.8222963041.

The spelling of 12620417 in words is "twelve million, six hundred twenty thousand, four hundred seventeen".