42431020 has 24 divisors (see below), whose sum is σ = 90363168. Its totient is φ = 16732800.

The previous prime is 42431003. The next prime is 42431041. The reversal of 42431020 is 2013424.

It is a junction number, because it is equal to n+sod(n) for n = 42430985 and 42431003.

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, 13521 + ... + 16360.

It is an arithmetic number, because the mean of its divisors is an integer number (3765132).

Almost surely, 2^42431020 is an apocalyptic number.

It is an amenable number.

42431020 is an abundant number, since it is smaller than the sum of its proper divisors (47932148).

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

42431020 is a wasteful number, since it uses less digits than its factorization.

42431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29961 (or 29959 counting only the distinct ones).

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

The square root of 42431020 is about 6513.9097322576. The cubic root of 42431020 is about 348.7876969225.

Adding to 42431020 its reverse (2013424), we get a palindrome (44444444).

The spelling of 42431020 in words is "forty-two million, four hundred thirty-one thousand, twenty".