4128269 has 4 divisors (see below), whose sum is σ = 4135740. Its totient is φ = 4120800.

The previous prime is 4128253. The next prime is 4128281. The reversal of 4128269 is 9628214.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1471369 + 2656900 = 1213^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 4128269 - 2⁴ = 4128253 is a prime.

It is a super-2 number, since 2×4128269² = 34085209872722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128869) 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, 2834 + ... + 4035.

It is an arithmetic number, because the mean of its divisors is an integer number (1033935).

Almost surely, 2^4128269 is an apocalyptic number.

It is an amenable number.

4128269 is a deficient number, since it is larger than the sum of its proper divisors (7471).

4128269 is an equidigital number, since it uses as much as digits as its factorization.

4128269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470.

The product of its digits is 6912, while the sum is 32.

The square root of 4128269 is about 2031.8142139477. The cubic root of 4128269 is about 160.4190706860.

Subtracting 4128269 from its reverse (9628214), we obtain a palindrome (5499945).

The spelling of 4128269 in words is "four million, one hundred twenty-eight thousand, two hundred sixty-nine".