42041640 has 32 divisors (see below), whose sum is σ = 126125280. Its totient is φ = 11211072.

The previous prime is 42041639. The next prime is 42041647. The reversal of 42041640 is 4614024.

It is not an unprimeable number, because it can be changed into a prime (42041647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175054 + ... + 175293.

It is an arithmetic number, because the mean of its divisors is an integer number (3941415).

Almost surely, 2^42041640 is an apocalyptic number.

42041640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42041640 is an abundant number, since it is smaller than the sum of its proper divisors (84083640).

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

42041640 is a wasteful number, since it uses less digits than its factorization.

42041640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350361 (or 350357 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 42041640 is about 6483.9524982837. The cubic root of 42041640 is about 347.7175009506.

Adding to 42041640 its reverse (4614024), we get a palindrome (46655664).

The spelling of 42041640 in words is "forty-two million, forty-one thousand, six hundred forty".