4245805 has 4 divisors (see below), whose sum is σ = 5094972. Its totient is φ = 3396640.

The previous prime is 4245799. The next prime is 4245811. The reversal of 4245805 is 5085424.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4245799) and next prime (4245811).

It can be written as a sum of positive squares in 2 ways, for example, as 1929321 + 2316484 = 1389^2 + 1522^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4245805 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424576 + ... + 424585.

It is an arithmetic number, because the mean of its divisors is an integer number (1273743).

Almost surely, 2^4245805 is an apocalyptic number.

It is an amenable number.

4245805 is a deficient number, since it is larger than the sum of its proper divisors (849167).

4245805 is an equidigital number, since it uses as much as digits as its factorization.

4245805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849166.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 4245805 is about 2060.5351246703. The cubic root of 4245805 is about 161.9272777290.

It can be divided in two parts, 4245 and 805, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 4245805 in words is "four million, two hundred forty-five thousand, eight hundred five".