4040429 has 2 divisors, whose sum is σ = 4040430. Its totient is φ = 4040428.

The previous prime is 4040419. The next prime is 4040431. The reversal of 4040429 is 9240404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3553225 + 487204 = 1885^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040429 - 2⁸ = 4040173 is a prime.

It is a Sophie Germain prime.

Together with 4040431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020214 + 2020215.

It is an arithmetic number, because the mean of its divisors is an integer number (2020215).

Almost surely, 2^4040429 is an apocalyptic number.

It is an amenable number.

4040429 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040429 is an equidigital number, since it uses as much as digits as its factorization.

4040429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4040429 is about 2010.0818391299. The cubic root of 4040429 is about 159.2731220745.

The spelling of 4040429 in words is "four million, forty thousand, four hundred twenty-nine".