12643802 has 4 divisors (see below), whose sum is σ = 18965706. Its totient is φ = 6321900.

The previous prime is 12643793. The next prime is 12643811. The reversal of 12643802 is 20834621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20834621 = 19 ⋅1096559.

It is an interprime number because it is at equal distance from previous prime (12643793) and next prime (12643811).

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 4583881 = 2839^2 + 2141^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3160949 + ... + 3160952.

Almost surely, 2^12643802 is an apocalyptic number.

12643802 is a deficient number, since it is larger than the sum of its proper divisors (6321904).

12643802 is an equidigital number, since it uses as much as digits as its factorization.

12643802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6321903.

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

The square root of 12643802 is about 3555.8124247491. The cubic root of 12643802 is about 232.9660102567.

The spelling of 12643802 in words is "twelve million, six hundred forty-three thousand, eight hundred two".