42049 has 4 divisors (see below), whose sum is σ = 48064.
Its totient is φ = 36036.
The previous prime is 42043. The next prime is 42061. The reversal of 42049 is 94024.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is not a de Polignac number, because 42049 - 25 = 42017 is a prime.
It is a Duffinian number.
It is a plaindrome in base 14.
It is a nialpdrome in base 16.
It is not an unprimeable number, because it can be changed into a prime (42043) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2997 + ... + 3010.
It is an arithmetic number, because the mean of its divisors is an integer number (12016).
242049 is an apocalyptic number.
It is an amenable number.
42049 is a deficient number, since it is larger than the sum of its proper divisors (6015).
42049 is an equidigital number, since it uses as much as digits as its factorization.
42049 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6014.
The product of its (nonzero) digits is 288, while the sum is 19.
The square root of 42049 is about 205.0585282304.
The cubic root of 42049 is about 34.7737790767.
The spelling of 42049 in words is "forty-two thousand, forty-nine".