12640302 has 12 divisors (see below), whose sum is σ = 27387360. Its totient is φ = 4213428.

The previous prime is 12640297. The next prime is 12640307. The reversal of 12640302 is 20304621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12640297) and next prime (12640307).

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 702239 = 12640302 / (1 + 2 + 6 + 4 + 0 + 3 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 351102 + ... + 351137.

It is an arithmetic number, because the mean of its divisors is an integer number (2282280).

Almost surely, 2^12640302 is an apocalyptic number.

12640302 is an abundant number, since it is smaller than the sum of its proper divisors (14747058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12640302 is a wasteful number, since it uses less digits than its factorization.

12640302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702247 (or 702244 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 12640302 is about 3555.3202387408. The cubic root of 12640302 is about 232.9445120743.

Adding to 12640302 its reverse (20304621), we get a palindrome (32944923).

The spelling of 12640302 in words is "twelve million, six hundred forty thousand, three hundred two".