42987544 has 8 divisors (see below), whose sum is σ = 80601660. Its totient is φ = 21493768.

The previous prime is 42987533. The next prime is 42987547. The reversal of 42987544 is 44578924.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 42987544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42987547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2686714 + ... + 2686729.

Almost surely, 2^42987544 is an apocalyptic number.

It is an amenable number.

42987544 is a deficient number, since it is larger than the sum of its proper divisors (37614116).

42987544 is a wasteful number, since it uses less digits than its factorization.

42987544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373449 (or 5373445 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 42987544 is about 6556.4886944156. The cubic root of 42987544 is about 350.3059746119.

The spelling of 42987544 in words is "forty-two million, nine hundred eighty-seven thousand, five hundred forty-four".