4158218 has 4 divisors (see below), whose sum is σ = 6237330. Its totient is φ = 2079108.

The previous prime is 4158211. The next prime is 4158233. The reversal of 4158218 is 8128514.

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., 3713329 + 444889 = 1927^2 + 667^2 .

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4158211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039553 + ... + 1039556.

Almost surely, 2^4158218 is an apocalyptic number.

4158218 is a deficient number, since it is larger than the sum of its proper divisors (2079112).

4158218 is a wasteful number, since it uses less digits than its factorization.

4158218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079111.

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

The square root of 4158218 is about 2039.1709099534. The cubic root of 4158218 is about 160.8060625339.

It can be divided in two parts, 41582 and 18, that multiplied together give a triangular number (748476 = T₁₂₂₃).

The spelling of 4158218 in words is "four million, one hundred fifty-eight thousand, two hundred eighteen".