42842031 has 16 divisors (see below), whose sum is σ = 61532160. Its totient is φ = 26436960.

The previous prime is 42841993. The next prime is 42842071. The reversal of 42842031 is 13024824.

It is a de Polignac number, because none of the positive numbers 2^k-42842031 is a prime.

It is a super-2 number, since 2×42842031² = 3670879240409922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42841992 and 42842010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42842071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7876 + ... + 12153.

It is an arithmetic number, because the mean of its divisors is an integer number (3845760).

Almost surely, 2^42842031 is an apocalyptic number.

42842031 is a deficient number, since it is larger than the sum of its proper divisors (18690129).

42842031 is a wasteful number, since it uses less digits than its factorization.

42842031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20086.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 42842031 is about 6545.3824181632. The cubic root of 42842031 is about 349.9102654308.

Adding to 42842031 its reverse (13024824), we get a palindrome (55866855).

The spelling of 42842031 in words is "forty-two million, eight hundred forty-two thousand, thirty-one".