42565538 has 4 divisors (see below), whose sum is σ = 63848310. Its totient is φ = 21282768.

The previous prime is 42565507. The next prime is 42565543. The reversal of 42565538 is 83556524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42471289 + 94249 = 6517^2 + 307^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10641383 + ... + 10641386.

Almost surely, 2^42565538 is an apocalyptic number.

42565538 is a deficient number, since it is larger than the sum of its proper divisors (21282772).

42565538 is a wasteful number, since it uses less digits than its factorization.

42565538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21282771.

The product of its digits is 144000, while the sum is 38.

The square root of 42565538 is about 6524.2270040212. The cubic root of 42565538 is about 349.1558924025.

The spelling of 42565538 in words is "forty-two million, five hundred sixty-five thousand, five hundred thirty-eight".