4129905 has 16 divisors (see below), whose sum is σ = 7116480. Its totient is φ = 2033088.

The previous prime is 4129871. The next prime is 4129907. The reversal of 4129905 is 5099214.

It is a happy number.

4129905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4129905 - 2⁶ = 4129841 is a prime.

It is a super-2 number, since 2×4129905² = 34112230618050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4129907) 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 15 ways as a sum of consecutive naturals, for example, 10395 + ... + 10784.

It is an arithmetic number, because the mean of its divisors is an integer number (444780).

Almost surely, 2^4129905 is an apocalyptic number.

It is an amenable number.

4129905 is a deficient number, since it is larger than the sum of its proper divisors (2986575).

4129905 is a wasteful number, since it uses less digits than its factorization.

4129905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21200.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 4129905 is about 2032.2167699338. The cubic root of 4129905 is about 160.4402588191.

The spelling of 4129905 in words is "four million, one hundred twenty-nine thousand, nine hundred five".