12953643 has 8 divisors (see below), whose sum is σ = 18287568. Its totient is φ = 8127744.

The previous prime is 12953593. The next prime is 12953651. The reversal of 12953643 is 34635921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12953643 - 2⁸ = 12953387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12953653) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 126946 + ... + 127047.

It is an arithmetic number, because the mean of its divisors is an integer number (2285946).

Almost surely, 2^12953643 is an apocalyptic number.

12953643 is a deficient number, since it is larger than the sum of its proper divisors (5333925).

12953643 is a wasteful number, since it uses less digits than its factorization.

12953643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254013.

The product of its digits is 19440, while the sum is 33.

The square root of 12953643 is about 3599.1169750371. The cubic root of 12953643 is about 234.8536466125.

The spelling of 12953643 in words is "twelve million, nine hundred fifty-three thousand, six hundred forty-three".