4065818 has 4 divisors (see below), whose sum is σ = 6098730. Its totient is φ = 2032908.

The previous prime is 4065781. The next prime is 4065821. The reversal of 4065818 is 8185604.

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

It can be written as a sum of positive squares in only one way, i.e., 3948169 + 117649 = 1987^2 + 343^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1016453 + ... + 1016456.

Almost surely, 2^4065818 is an apocalyptic number.

4065818 is a deficient number, since it is larger than the sum of its proper divisors (2032912).

4065818 is a wasteful number, since it uses less digits than its factorization.

4065818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032911.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 4065818 is about 2016.3873635787. The cubic root of 4065818 is about 159.6060359566.

The spelling of 4065818 in words is "four million, sixty-five thousand, eight hundred eighteen".