42043140 has 72 divisors (see below), whose sum is σ = 128576448. Its totient is φ = 11119680.

The previous prime is 42043139. The next prime is 42043201. The reversal of 42043140 is 4134024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22689 + ... + 24471.

It is an arithmetic number, because the mean of its divisors is an integer number (1785784).

Almost surely, 2^42043140 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 42043140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64288224).

42043140 is an abundant number, since it is smaller than the sum of its proper divisors (86533308).

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

42043140 is a wasteful number, since it uses less digits than its factorization.

42043140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1924 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42043140 is about 6484.0681674393. The cubic root of 42043140 is about 347.7216362956.

Adding to 42043140 its reverse (4134024), we get a palindrome (46177164).

The spelling of 42043140 in words is "forty-two million, forty-three thousand, one hundred forty".