42040256 has 28 divisors (see below), whose sum is σ = 86304120. Its totient is φ = 20294400.

The previous prime is 42040253. The next prime is 42040259. The reversal of 42040256 is 65204024.

It is an interprime number because it is at equal distance from previous prime (42040253) and next prime (42040259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9470 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (3082290).

Almost surely, 2^42040256 is an apocalyptic number.

It is an amenable number.

42040256 is an abundant number, since it is smaller than the sum of its proper divisors (44263864).

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

42040256 is a wasteful number, since it uses less digits than its factorization.

42040256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22692 (or 22682 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42040256 is about 6483.8457723792. The cubic root of 42040256 is about 347.7136853185.

The spelling of 42040256 in words is "forty-two million, forty thousand, two hundred fifty-six".