42400242 has 24 divisors (see below), whose sum is σ = 92141244. Its totient is φ = 14091264.

The previous prime is 42400207. The next prime is 42400243. The reversal of 42400242 is 24200424.

42400242 is a `hidden beast` number, since 424 + 0 + 0 + 242 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37564641 + 4835601 = 6129^2 + 2199^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42400243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3018 + ... + 9690.

Almost surely, 2^42400242 is an apocalyptic number.

42400242 is an abundant number, since it is smaller than the sum of its proper divisors (49741002).

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

42400242 is a wasteful number, since it uses less digits than its factorization.

42400242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034 (or 7031 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42400242 is about 6511.5468208407. The cubic root of 42400242 is about 348.7033436641.

Adding to 42400242 its reverse (24200424), we get a palindrome (66600666).

The spelling of 42400242 in words is "forty-two million, four hundred thousand, two hundred forty-two".