42081584 has 10 divisors (see below), whose sum is σ = 81533100. Its totient is φ = 21040784.

The previous prime is 42081583. The next prime is 42081619. The reversal of 42081584 is 48518024.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42081584.

It is not an unprimeable number, because it can be changed into a prime (42081583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315034 + ... + 1315065.

It is an arithmetic number, because the mean of its divisors is an integer number (8153310).

Almost surely, 2^42081584 is an apocalyptic number.

It is an amenable number.

42081584 is a deficient number, since it is larger than the sum of its proper divisors (39451516).

42081584 is a wasteful number, since it uses less digits than its factorization.

42081584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630107 (or 2630101 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 42081584 is about 6487.0319869722. The cubic root of 42081584 is about 347.8275888812.

The spelling of 42081584 in words is "forty-two million, eighty-one thousand, five hundred eighty-four".