12640283 has 2 divisors, whose sum is σ = 12640284. Its totient is φ = 12640282.

The previous prime is 12640261. The next prime is 12640291. The reversal of 12640283 is 38204621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12640283 - 2²² = 8445979 is a prime.

It is a super-4 number, since 4×12640283⁴ (a number of 30 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (12640783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320141 + 6320142.

It is an arithmetic number, because the mean of its divisors is an integer number (6320142).

Almost surely, 2^12640283 is an apocalyptic number.

12640283 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640283 is an equidigital number, since it uses as much as digits as its factorization.

12640283 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 12640283 is about 3555.3175666880. The cubic root of 12640283 is about 232.9443953591.

The spelling of 12640283 in words is "twelve million, six hundred forty thousand, two hundred eighty-three".