42340442 has 4 divisors (see below), whose sum is σ = 63510666. Its totient is φ = 21170220.

The previous prime is 42340439. The next prime is 42340453. The reversal of 42340442 is 24404324.

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., 29170801 + 13169641 = 5401^2 + 3629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10585109 + ... + 10585112.

Almost surely, 2^42340442 is an apocalyptic number.

42340442 is a deficient number, since it is larger than the sum of its proper divisors (21170224).

42340442 is a wasteful number, since it uses less digits than its factorization.

42340442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21170223.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 42340442 is about 6506.9533577551. The cubic root of 42340442 is about 348.5393330368.

Adding to 42340442 its reverse (24404324), we get a palindrome (66744766).

The spelling of 42340442 in words is "forty-two million, three hundred forty thousand, four hundred forty-two".