11142647 has 4 divisors (see below), whose sum is σ = 11295360. Its totient is φ = 10989936.

The previous prime is 11142631. The next prime is 11142653. The reversal of 11142647 is 74624111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74624111 = 79 ⋅944609.

It is a cyclic number.

It is not a de Polignac number, because 11142647 - 2⁴ = 11142631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142617) 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 3 ways as a sum of consecutive naturals, for example, 76247 + ... + 76392.

It is an arithmetic number, because the mean of its divisors is an integer number (2823840).

Almost surely, 2^11142647 is an apocalyptic number.

11142647 is a deficient number, since it is larger than the sum of its proper divisors (152713).

11142647 is an equidigital number, since it uses as much as digits as its factorization.

11142647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152712.

The product of its digits is 1344, while the sum is 26.

The square root of 11142647 is about 3338.0603649425. The cubic root of 11142647 is about 223.3552289119.

Adding to 11142647 its reverse (74624111), we get a palindrome (85766758).

The spelling of 11142647 in words is "eleven million, one hundred forty-two thousand, six hundred forty-seven".