42115 has 4 divisors (see below), whose sum is σ = 50544. Its totient is φ = 33688.

The previous prime is 42101. The next prime is 42131. The reversal of 42115 is 51124.

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

It is a cyclic number.

It is not a de Polignac number, because 42115 - 2⁵ = 42083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42095 and 42104.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42115.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4207 + ... + 4216.

It is an arithmetic number, because the mean of its divisors is an integer number (12636).

2⁴²¹¹⁵ is an apocalyptic number.

42115 is a deficient number, since it is larger than the sum of its proper divisors (8429).

42115 is an equidigital number, since it uses as much as digits as its factorization.

42115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8428.

The product of its digits is 40, while the sum is 13.

The square root of 42115 is about 205.2193947949. The cubic root of 42115 is about 34.7919631769.

Adding to 42115 its reverse (51124), we get a palindrome (93239).

Subtracting 42115 from its reverse (51124), we obtain a palindrome (9009).

The spelling of 42115 in words is "forty-two thousand, one hundred fifteen".