4129969 has 4 divisors (see below), whose sum is σ = 4172644. Its totient is φ = 4087296.

The previous prime is 4129943. The next prime is 4129981. The reversal of 4129969 is 9699214.

4129969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2930944 + 1199025 = 1712^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 4129969 - 2⁷ = 4129841 is a prime.

It is a super-2 number, since 2×4129969² = 34113287881922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4129369) 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 3 ways as a sum of consecutive naturals, for example, 21192 + ... + 21385.

It is an arithmetic number, because the mean of its divisors is an integer number (1043161).

Almost surely, 2^4129969 is an apocalyptic number.

It is an amenable number.

4129969 is a deficient number, since it is larger than the sum of its proper divisors (42675).

4129969 is an equidigital number, since it uses as much as digits as its factorization.

4129969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42674.

The product of its digits is 34992, while the sum is 40.

The square root of 4129969 is about 2032.2325162245. The cubic root of 4129969 is about 160.4410875810.

The spelling of 4129969 in words is "four million, one hundred twenty-nine thousand, nine hundred sixty-nine".