4069805 has 4 divisors (see below), whose sum is σ = 4883772. Its totient is φ = 3255840.

The previous prime is 4069801. The next prime is 4069837. The reversal of 4069805 is 5089604.

4069805 = 1426² + 1427².

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 2036329 + 2033476 = 1427^2 + 1426^2 .

It is not a de Polignac number, because 4069805 - 2² = 4069801 is a prime.

It is a super-3 number, since 3×4069805³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4069801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406976 + ... + 406985.

It is an arithmetic number, because the mean of its divisors is an integer number (1220943).

Almost surely, 2^4069805 is an apocalyptic number.

4069805 is the 1427-th centered square number.

It is an amenable number.

4069805 is a deficient number, since it is larger than the sum of its proper divisors (813967).

4069805 is an equidigital number, since it uses as much as digits as its factorization.

4069805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813966.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 4069805 is about 2017.3757706486. The cubic root of 4069805 is about 159.6581895760.

The spelling of 4069805 in words is "four million, sixty-nine thousand, eight hundred five".