42031420 has 24 divisors (see below), whose sum is σ = 92912400. Its totient is φ = 15927552.

The previous prime is 42031417. The next prime is 42031441. The reversal of 42031420 is 2413024.

It is a junction number, because it is equal to n+sod(n) for n = 42031394 and 42031403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54925 + ... + 55684.

It is an arithmetic number, because the mean of its divisors is an integer number (3871350).

Almost surely, 2^42031420 is an apocalyptic number.

It is an amenable number.

42031420 is an abundant number, since it is smaller than the sum of its proper divisors (50880980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42031420 is a wasteful number, since it uses less digits than its factorization.

42031420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110637 (or 110635 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42031420 is about 6483.1643508398. The cubic root of 42031420 is about 347.6893228487.

Adding to 42031420 its reverse (2413024), we get a palindrome (44444444).

The spelling of 42031420 in words is "forty-two million, thirty-one thousand, four hundred twenty".