42040434 has 16 divisors (see below), whose sum is σ = 84268800. Its totient is φ = 13982160.

The previous prime is 42040421. The next prime is 42040447. The reversal of 42040434 is 43404024.

It is an interprime number because it is at equal distance from previous prime (42040421) and next prime (42040447).

It is a self number, because there is not a number n which added to its sum of digits gives 42040434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4834 + ... + 10365.

It is an arithmetic number, because the mean of its divisors is an integer number (5266800).

Almost surely, 2^42040434 is an apocalyptic number.

42040434 is an abundant number, since it is smaller than the sum of its proper divisors (42228366).

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

42040434 is a wasteful number, since it uses less digits than its factorization.

42040434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15665.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 42040434 is about 6483.8594987862. The cubic root of 42040434 is about 347.7141760620.

Adding to 42040434 its reverse (43404024), we get a palindrome (85444458).

The spelling of 42040434 in words is "forty-two million, forty thousand, four hundred thirty-four".