12643530 has 32 divisors (see below), whose sum is σ = 30449088. Its totient is φ = 3360000.

The previous prime is 12643513. The next prime is 12643541. The reversal of 12643530 is 3534621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12643530.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 11505 + ... + 12555.

It is an arithmetic number, because the mean of its divisors is an integer number (951534).

Almost surely, 2^12643530 is an apocalyptic number.

12643530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12643530 is an abundant number, since it is smaller than the sum of its proper divisors (17805558).

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

12643530 is a wasteful number, since it uses less digits than its factorization.

12643530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 12643530 is about 3555.7741773065. The cubic root of 12643530 is about 232.9643396830.

The spelling of 12643530 in words is "twelve million, six hundred forty-three thousand, five hundred thirty".