42031340 has 24 divisors (see below), whose sum is σ = 95056080. Its totient is φ = 15519168.

The previous prime is 42031337. The next prime is 42031349. The reversal of 42031340 is 4313024.

It is not an unprimeable number, because it can be changed into a prime (42031349) by changing a digit.

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, 80570 + ... + 81089.

It is an arithmetic number, because the mean of its divisors is an integer number (3960670).

Almost surely, 2^42031340 is an apocalyptic number.

It is an amenable number.

42031340 is an abundant number, since it is smaller than the sum of its proper divisors (53024740).

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

42031340 is a wasteful number, since it uses less digits than its factorization.

42031340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161681 (or 161679 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 42031340 is about 6483.1581810102. The cubic root of 42031340 is about 347.6891022584.

Adding to 42031340 its reverse (4313024), we get a palindrome (46344364).

The spelling of 42031340 in words is "forty-two million, thirty-one thousand, three hundred forty".