42000140 has 96 divisors (see below), whose sum is σ = 111089664. Its totient is φ = 12983040.

The previous prime is 42000137. The next prime is 42000191. The reversal of 42000140 is 4100024.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 85295 + ... + 85785.

It is an arithmetic number, because the mean of its divisors is an integer number (1157184).

Almost surely, 2^42000140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42000140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55544832).

42000140 is an abundant number, since it is smaller than the sum of its proper divisors (69089524).

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

42000140 is a wasteful number, since it uses less digits than its factorization.

42000140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 42000140 is about 6480.7514996334. The cubic root of 42000140 is about 347.6030507134.

Adding to 42000140 its reverse (4100024), we get a palindrome (46100164).

The spelling of 42000140 in words is "forty-two million, one hundred forty", and thus it is an aban number.