42365 has 8 divisors (see below), whose sum is σ = 52440. Its totient is φ = 32832.

The previous prime is 42359. The next prime is 42373. The reversal of 42365 is 56324.

It can be written as a sum of positive squares in 4 ways, for example, as 22201 + 20164 = 149^2 + 142^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42365 - 2⁴ = 42349 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71 + ... + 299.

It is an arithmetic number, because the mean of its divisors is an integer number (6555).

2⁴²³⁶⁵ is an apocalyptic number.

It is an amenable number.

42365 is a deficient number, since it is larger than the sum of its proper divisors (10075).

42365 is a wasteful number, since it uses less digits than its factorization.

42365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its digits is 720, while the sum is 20.

The square root of 42365 is about 205.8275977608. The cubic root of 42365 is about 34.8606705776.

Adding to 42365 its reverse (56324), we get a palindrome (98689).

It can be divided in two parts, 423 and 65, that multiplied together give a triangular number (27495 = T₂₃₄).

The spelling of 42365 in words is "forty-two thousand, three hundred sixty-five".