11478643 has 4 divisors (see below), whose sum is σ = 12522168. Its totient is φ = 10435120.

The previous prime is 11478631. The next prime is 11478661. The reversal of 11478643 is 34687411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34687411 = 11 ⋅3153401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11478643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11478599 and 11478608.

It is not an unprimeable number, because it can be changed into a prime (11478673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521746 + ... + 521767.

It is an arithmetic number, because the mean of its divisors is an integer number (3130542).

Almost surely, 2^11478643 is an apocalyptic number.

11478643 is a deficient number, since it is larger than the sum of its proper divisors (1043525).

11478643 is a wasteful number, since it uses less digits than its factorization.

11478643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043524.

The product of its digits is 16128, while the sum is 34.

The square root of 11478643 is about 3388.0146103581. The cubic root of 11478643 is about 225.5780560095.

It can be divided in two parts, 11478 and 643, that added together give a palindrome (12121).

The spelling of 11478643 in words is "eleven million, four hundred seventy-eight thousand, six hundred forty-three".