4128071 has 4 divisors (see below), whose sum is σ = 4189752. Its totient is φ = 4066392.

The previous prime is 4128049. The next prime is 4128079. The reversal of 4128071 is 1708214.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4128071 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 (4128079) 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, 30740 + ... + 30873.

It is an arithmetic number, because the mean of its divisors is an integer number (1047438).

Almost surely, 2^4128071 is an apocalyptic number.

4128071 is a deficient number, since it is larger than the sum of its proper divisors (61681).

4128071 is an equidigital number, since it uses as much as digits as its factorization.

4128071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61680.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 4128071 is about 2031.7654884361. The cubic root of 4128071 is about 160.4165059724.

The spelling of 4128071 in words is "four million, one hundred twenty-eight thousand, seventy-one".