42440242 has 8 divisors (see below), whose sum is σ = 68557356. Its totient is φ = 19587792.

The previous prime is 42440197. The next prime is 42440249. The reversal of 42440242 is 24204424.

It can be written as a sum of positive squares in 2 ways, for example, as 42263001 + 177241 = 6501^2 + 421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42440249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816133 + ... + 816184.

Almost surely, 2^42440242 is an apocalyptic number.

42440242 is a deficient number, since it is larger than the sum of its proper divisors (26117114).

42440242 is a wasteful number, since it uses less digits than its factorization.

42440242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632332.

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 42440242 is about 6514.6175636026. The cubic root of 42440242 is about 348.8129637135.

Adding to 42440242 its reverse (24204424), we get a palindrome (66644666).

The spelling of 42440242 in words is "forty-two million, four hundred forty thousand, two hundred forty-two".