42544 has 10 divisors (see below), whose sum is σ = 82460. Its totient is φ = 21264.

The previous prime is 42533. The next prime is 42557. The reversal of 42544 is 44524.

It is a nialpdrome in base 9 and base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314 + ... + 1345.

It is an arithmetic number, because the mean of its divisors is an integer number (8246).

2⁴²⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

42544 is a deficient number, since it is larger than the sum of its proper divisors (39916).

42544 is a wasteful number, since it uses less digits than its factorization.

42544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667 (or 2661 counting only the distinct ones).

The product of its digits is 640, while the sum is 19.

The square root of 42544 is about 206.2619693497. The cubic root of 42544 is about 34.9096991950.

The spelling of 42544 in words is "forty-two thousand, five hundred forty-four".