4018345 has 4 divisors (see below), whose sum is σ = 4822020. Its totient is φ = 3214672.

The previous prime is 4018337. The next prime is 4018349. The reversal of 4018345 is 5438104.

4018345 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 2702736 + 1315609 = 1644^2 + 1147^2 .

It is a cyclic number.

It is not a de Polignac number, because 4018345 - 2³ = 4018337 is a prime.

It is a super-2 number, since 2×4018345² = 32294193078050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4018349) 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, 401830 + ... + 401839.

It is an arithmetic number, because the mean of its divisors is an integer number (1205505).

Almost surely, 2^4018345 is an apocalyptic number.

It is an amenable number.

4018345 is a deficient number, since it is larger than the sum of its proper divisors (803675).

4018345 is an equidigital number, since it uses as much as digits as its factorization.

4018345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803674.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4018345 is about 2004.5810036015. The cubic root of 4018345 is about 158.9824090872.

The spelling of 4018345 in words is "four million, eighteen thousand, three hundred forty-five".