4509018 has 12 divisors (see below), whose sum is σ = 9769578. Its totient is φ = 1503000.

The previous prime is 4509017. The next prime is 4509019. The reversal of 4509018 is 8109054.

It is an interprime number because it is at equal distance from previous prime (4509017) and next prime (4509019).

It can be written as a sum of positive squares in only one way, i.e., 2913849 + 1595169 = 1707^2 + 1263^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 4508982 and 4509000.

It is not an unprimeable number, because it can be changed into a prime (4509013) 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 5 ways as a sum of consecutive naturals, for example, 125233 + ... + 125268.

Almost surely, 2^4509018 is an apocalyptic number.

4509018 is an abundant number, since it is smaller than the sum of its proper divisors (5260560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4509018 is a wasteful number, since it uses less digits than its factorization.

4509018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250509 (or 250506 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 4509018 is about 2123.4448427025. Note that the first 3 decimals coincide. The cubic root of 4509018 is about 165.2065732268.

The spelling of 4509018 in words is "four million, five hundred nine thousand, eighteen".