42158565 has 24 divisors (see below), whose sum is σ = 73232640. Its totient is φ = 22436064.

The previous prime is 42158531. The next prime is 42158579. The reversal of 42158565 is 56585124.

42158565 is a `hidden beast` number, since 42 + 1 + 58 + 565 = 666.

It is not a de Polignac number, because 42158565 - 2¹⁴ = 42142181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31704 + ... + 33006.

It is an arithmetic number, because the mean of its divisors is an integer number (3051360).

Almost surely, 2^42158565 is an apocalyptic number.

42158565 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42158565 is a deficient number, since it is larger than the sum of its proper divisors (31074075).

42158565 is a wasteful number, since it uses less digits than its factorization.

42158565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033 (or 2030 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 42158565 is about 6492.9627289859. The cubic root of 42158565 is about 348.0395565420.

The spelling of 42158565 in words is "forty-two million, one hundred fifty-eight thousand, five hundred sixty-five".