42102140 has 24 divisors (see below), whose sum is σ = 90084960. Its totient is φ = 16522688.

The previous prime is 42102133. The next prime is 42102143. The reversal of 42102140 is 4120124.

42102140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42102143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18800 + ... + 20919.

It is an arithmetic number, because the mean of its divisors is an integer number (3753540).

Almost surely, 2^42102140 is an apocalyptic number.

It is an amenable number.

42102140 is an abundant number, since it is smaller than the sum of its proper divisors (47982820).

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

42102140 is a wasteful number, since it uses less digits than its factorization.

42102140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39781 (or 39779 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42102140 is about 6488.6161852894. The cubic root of 42102140 is about 347.8842152353.

Adding to 42102140 its reverse (4120124), we get a palindrome (46222264).

The spelling of 42102140 in words is "forty-two million, one hundred two thousand, one hundred forty".