42131320 has 64 divisors (see below), whose sum is σ = 118195200. Its totient is φ = 13130880.

The previous prime is 42131281. The next prime is 42131347. The reversal of 42131320 is 2313124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42131294 and 42131303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3760 + ... + 9919.

It is an arithmetic number, because the mean of its divisors is an integer number (1846800).

Almost surely, 2^42131320 is an apocalyptic number.

42131320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42131320 is an abundant number, since it is smaller than the sum of its proper divisors (76063880).

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

42131320 is a wasteful number, since it uses less digits than its factorization.

42131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13708 (or 13704 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 42131320 is about 6490.8643492219. The cubic root of 42131320 is about 347.9645667891.

Adding to 42131320 its reverse (2313124), we get a palindrome (44444444).

The spelling of 42131320 in words is "forty-two million, one hundred thirty-one thousand, three hundred twenty".