4128947 has 4 divisors (see below), whose sum is σ = 4346280. Its totient is φ = 3911616.

The previous prime is 4128931. The next prime is 4128959. The reversal of 4128947 is 7498214.

4128947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4128947 - 2⁴ = 4128931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4128967) 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 3 ways as a sum of consecutive naturals, for example, 108638 + ... + 108675.

It is an arithmetic number, because the mean of its divisors is an integer number (1086570).

Almost surely, 2^4128947 is an apocalyptic number.

4128947 is a deficient number, since it is larger than the sum of its proper divisors (217333).

4128947 is a wasteful number, since it uses less digits than its factorization.

4128947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217332.

The product of its digits is 16128, while the sum is 35.

The square root of 4128947 is about 2031.9810530613. The cubic root of 4128947 is about 160.4278522663.

The spelling of 4128947 in words is "four million, one hundred twenty-eight thousand, nine hundred forty-seven".