42431842 has 4 divisors (see below), whose sum is σ = 63647766. Its totient is φ = 21215920.

The previous prime is 42431833. The next prime is 42431867. The reversal of 42431842 is 24813424.

It is a happy number.

42431842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 35509681 + 6922161 = 5959^2 + 2631^2 .

It is a super-2 number, since 2×42431842² = 3600922431025928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42431842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607959 + ... + 10607962.

Almost surely, 2^42431842 is an apocalyptic number.

42431842 is a deficient number, since it is larger than the sum of its proper divisors (21215924).

42431842 is a wasteful number, since it uses less digits than its factorization.

42431842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21215923.

The product of its digits is 6144, while the sum is 28.

The square root of 42431842 is about 6513.9728276989. The cubic root of 42431842 is about 348.7899492184.

The spelling of 42431842 in words is "forty-two million, four hundred thirty-one thousand, eight hundred forty-two".