4128279 has 4 divisors (see below), whose sum is σ = 5504376. Its totient is φ = 2752184.

The previous prime is 4128253. The next prime is 4128281. The reversal of 4128279 is 9728214.

It is a happy number.

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 4128279 - 2⁸ = 4128023 is a prime.

It is an Ulam number.

It is a D-number.

4128279 is a lucky 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, 688044 + ... + 688049.

It is an arithmetic number, because the mean of its divisors is an integer number (1376094).

Almost surely, 2^4128279 is an apocalyptic number.

4128279 is a deficient number, since it is larger than the sum of its proper divisors (1376097).

4128279 is a wasteful number, since it uses less digits than its factorization.

4128279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376096.

The product of its digits is 8064, while the sum is 33.

The square root of 4128279 is about 2031.8166748011. The cubic root of 4128279 is about 160.4192002149.

The spelling of 4128279 in words is "four million, one hundred twenty-eight thousand, two hundred seventy-nine".