4128869 has 2 divisors, whose sum is σ = 4128870. Its totient is φ = 4128868.

The previous prime is 4128857. The next prime is 4128877. The reversal of 4128869 is 9688214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4060225 + 68644 = 2015^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 4128869 - 2⁸ = 4128613 is a prime.

It is a super-2 number, since 2×4128869² = 34095118438322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4128829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064434 + 2064435.

It is an arithmetic number, because the mean of its divisors is an integer number (2064435).

Almost surely, 2^4128869 is an apocalyptic number.

It is an amenable number.

4128869 is a deficient number, since it is larger than the sum of its proper divisors (1).

4128869 is an equidigital number, since it uses as much as digits as its factorization.

4128869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 4128869 is about 2031.9618598783. The cubic root of 4128869 is about 160.4268420449.

The spelling of 4128869 in words is "four million, one hundred twenty-eight thousand, eight hundred sixty-nine".