4243618 has 4 divisors (see below), whose sum is σ = 6365430. Its totient is φ = 2121808.

The previous prime is 4243607. The next prime is 4243619. The reversal of 4243618 is 8163424.

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., 4149369 + 94249 = 2037^2 + 307^2 .

It is a d-powerful number, because it can be written as 4² + 2¹¹ + 4¹¹ + 3⁴ + 6⁶ + 1 + 8³ .

It is not an unprimeable number, because it can be changed into a prime (4243619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060903 + ... + 1060906.

Almost surely, 2^4243618 is an apocalyptic number.

4243618 is a deficient number, since it is larger than the sum of its proper divisors (2121812).

4243618 is a wasteful number, since it uses less digits than its factorization.

4243618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121811.

The product of its digits is 4608, while the sum is 28.

The square root of 4243618 is about 2060.0043689274. The cubic root of 4243618 is about 161.8994702203.

It can be divided in two parts, 42 and 43618, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 4243618 in words is "four million, two hundred forty-three thousand, six hundred eighteen".