42002140 has 24 divisors (see below), whose sum is σ = 92040480. Its totient is φ = 16070208.

The previous prime is 42002119. The next prime is 42002143. The reversal of 42002140 is 4120024.

It is a self number, because there is not a number n which added to its sum of digits gives 42002140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42002143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45195 + ... + 46114.

It is an arithmetic number, because the mean of its divisors is an integer number (3835020).

Almost surely, 2^42002140 is an apocalyptic number.

It is an amenable number.

42002140 is an abundant number, since it is smaller than the sum of its proper divisors (50038340).

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

42002140 is a wasteful number, since it uses less digits than its factorization.

42002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91341 (or 91339 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 42002140 is about 6480.9058008893. The cubic root of 42002140 is about 347.6085681162.

Adding to 42002140 its reverse (4120024), we get a palindrome (46122164).

The spelling of 42002140 in words is "forty-two million, two thousand, one hundred forty".