4521818 has 12 divisors (see below), whose sum is σ = 7890282. Its totient is φ = 1937880.

The previous prime is 4521817. The next prime is 4521821. The reversal of 4521818 is 8181254.

It can be written as a sum of positive squares in only one way, i.e., 4439449 + 82369 = 2107^2 + 287^2 .

It is an alternating number because its digits alternate between even and odd.

4521818 is a modest number, since divided by 1818 gives 452 as remainder.

It is not an unprimeable number, because it can be changed into a prime (4521817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22973 + ... + 23168.

Almost surely, 2^4521818 is an apocalyptic number.

4521818 is a deficient number, since it is larger than the sum of its proper divisors (3368464).

4521818 is a wasteful number, since it uses less digits than its factorization.

4521818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46157 (or 46150 counting only the distinct ones).

The product of its digits is 2560, while the sum is 29.

The square root of 4521818 is about 2126.4566771980. The cubic root of 4521818 is about 165.3627525620.

The spelling of 4521818 in words is "four million, five hundred twenty-one thousand, eight hundred eighteen".