4042018 has 4 divisors (see below), whose sum is σ = 6063030. Its totient is φ = 2021008.

The previous prime is 4042001. The next prime is 4042019. The reversal of 4042018 is 8102404.

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., 2712609 + 1329409 = 1647^2 + 1153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4041986 and 4042004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010503 + ... + 1010506.

Almost surely, 2^4042018 is an apocalyptic number.

4042018 is a deficient number, since it is larger than the sum of its proper divisors (2021012).

4042018 is a wasteful number, since it uses less digits than its factorization.

4042018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021011.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 4042018 is about 2010.4770578149. The cubic root of 4042018 is about 159.2939987207.

The spelling of 4042018 in words is "four million, forty-two thousand, eighteen".