42051 has 8 divisors (see below), whose sum is σ = 57024. Its totient is φ = 27560.

The previous prime is 42043. The next prime is 42061. The reversal of 42051 is 15024.

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 42051 - 2³ = 42043 is a prime.

42051 is a lucky 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 (42061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 386.

It is an arithmetic number, because the mean of its divisors is an integer number (7128).

2⁴²⁰⁵¹ is an apocalyptic number.

42051 is a deficient number, since it is larger than the sum of its proper divisors (14973).

42051 is a wasteful number, since it uses less digits than its factorization.

42051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 42051 is about 205.0634048288. The cubic root of 42051 is about 34.7743303895.

Adding to 42051 its reverse (15024), we get a palindrome (57075).

The spelling of 42051 in words is "forty-two thousand, fifty-one".