42431420 has 24 divisors (see below), whose sum is σ = 89376000. Its totient is φ = 16921152.

The previous prime is 42431407. The next prime is 42431447. The reversal of 42431420 is 2413424.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 42431392 and 42431401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3941 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (3724000).

Almost surely, 2^42431420 is an apocalyptic number.

It is an amenable number.

42431420 is an abundant number, since it is smaller than the sum of its proper divisors (46944580).

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

42431420 is a wasteful number, since it uses less digits than its factorization.

42431420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437 (or 6435 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42431420 is about 6513.9404357117. The cubic root of 42431420 is about 348.7887929338.

Adding to 42431420 its reverse (2413424), we get a palindrome (44844844).

The spelling of 42431420 in words is "forty-two million, four hundred thirty-one thousand, four hundred twenty".