4218194 has 4 divisors (see below), whose sum is σ = 6327294. Its totient is φ = 2109096.

The previous prime is 4218173. The next prime is 4218199. The reversal of 4218194 is 4918124.

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., 3286969 + 931225 = 1813^2 + 965^2 .

It is not an unprimeable number, because it can be changed into a prime (4218199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054547 + ... + 1054550.

Almost surely, 2^4218194 is an apocalyptic number.

4218194 is a deficient number, since it is larger than the sum of its proper divisors (2109100).

4218194 is a wasteful number, since it uses less digits than its factorization.

4218194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109099.

The product of its digits is 2304, while the sum is 29.

The square root of 4218194 is about 2053.8242378548. The cubic root of 4218194 is about 161.5755029772.

The spelling of 4218194 in words is "four million, two hundred eighteen thousand, one hundred ninety-four".