42427031 has 4 divisors (see below), whose sum is σ = 42440112. Its totient is φ = 42413952.

The previous prime is 42427009. The next prime is 42427037. The reversal of 42427031 is 13072424.

42427031 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42427031 is a prime.

It is a super-2 number, since 2×42427031² = 3600105918949922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42426988 and 42427006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42427037) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2390 + ... + 9516.

It is an arithmetic number, because the mean of its divisors is an integer number (10610028).

Almost surely, 2^42427031 is an apocalyptic number.

42427031 is a deficient number, since it is larger than the sum of its proper divisors (13081).

42427031 is an equidigital number, since it uses as much as digits as its factorization.

42427031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13080.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 42427031 is about 6513.6035341430. The cubic root of 42427031 is about 348.7767665723.

Adding to 42427031 its reverse (13072424), we get a palindrome (55499455).

The spelling of 42427031 in words is "forty-two million, four hundred twenty-seven thousand, thirty-one".