42252818 has 4 divisors (see below), whose sum is σ = 63379230. Its totient is φ = 21126408.

The previous prime is 42252811. The next prime is 42252841. The reversal of 42252818 is 81825224.

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., 40284409 + 1968409 = 6347^2 + 1403^2 .

It is a super-2 number, since 2×42252818² = 3570601257882248, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42252811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10563203 + ... + 10563206.

Almost surely, 2^42252818 is an apocalyptic number.

42252818 is a deficient number, since it is larger than the sum of its proper divisors (21126412).

42252818 is a wasteful number, since it uses less digits than its factorization.

42252818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21126411.

The product of its digits is 10240, while the sum is 32.

The square root of 42252818 is about 6500.2167656164. The cubic root of 42252818 is about 348.2987316855.

The spelling of 42252818 in words is "forty-two million, two hundred fifty-two thousand, eight hundred eighteen".