4128647 has 4 divisors (see below), whose sum is σ = 4206600. Its totient is φ = 4050696.

The previous prime is 4128623. The next prime is 4128689. The reversal of 4128647 is 7468214.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4128647 - 2⁸ = 4128391 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 (4128617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38897 + ... + 39002.

It is an arithmetic number, because the mean of its divisors is an integer number (1051650).

Almost surely, 2^4128647 is an apocalyptic number.

4128647 is a deficient number, since it is larger than the sum of its proper divisors (77953).

4128647 is an equidigital number, since it uses as much as digits as its factorization.

4128647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77952.

The product of its digits is 10752, while the sum is 32.

The square root of 4128647 is about 2031.9072321344. The cubic root of 4128647 is about 160.4239667299.

The spelling of 4128647 in words is "four million, one hundred twenty-eight thousand, six hundred forty-seven".