42018252 has 24 divisors (see below), whose sum is σ = 99226176. Its totient is φ = 13837008.

The previous prime is 42018233. The next prime is 42018257. The reversal of 42018252 is 25281024.

It is a super-2 number, since 2×42018252² = 3531067002271008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42018257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20098 + ... + 22089.

It is an arithmetic number, because the mean of its divisors is an integer number (4134424).

Almost surely, 2^42018252 is an apocalyptic number.

It is an amenable number.

42018252 is an abundant number, since it is smaller than the sum of its proper divisors (57207924).

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

42018252 is a wasteful number, since it uses less digits than its factorization.

42018252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42277 (or 42275 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 42018252 is about 6482.1487178250. The cubic root of 42018252 is about 347.6530099253.

Adding to 42018252 its reverse (25281024), we get a palindrome (67299276).

The spelling of 42018252 in words is "forty-two million, eighteen thousand, two hundred fifty-two".