12758643 has 12 divisors (see below), whose sum is σ = 18460728. Its totient is φ = 8491200.

The previous prime is 12758621. The next prime is 12758663. The reversal of 12758643 is 34685721.

12758643 is a `hidden beast` number, since 1 + 2 + 7 + 5 + 8 + 643 = 666.

It is not a de Polignac number, because 12758643 - 2⁸ = 12758387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12758598 and 12758607.

It is not an unprimeable number, because it can be changed into a prime (12758663) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 8068 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (1538394).

Almost surely, 2^12758643 is an apocalyptic number.

12758643 is a deficient number, since it is larger than the sum of its proper divisors (5702085).

12758643 is a wasteful number, since it uses less digits than its factorization.

12758643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434 (or 2431 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 12758643 is about 3571.9242713137. The cubic root of 12758643 is about 233.6692126474.

The spelling of 12758643 in words is "twelve million, seven hundred fifty-eight thousand, six hundred forty-three".