42061 has 2 divisors, whose sum is σ = 42062. Its totient is φ = 42060.

The previous prime is 42043. The next prime is 42071. The reversal of 42061 is 16024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42025 + 36 = 205^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 42061 - 2⁹ = 41549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21030 + 21031.

It is an arithmetic number, because the mean of its divisors is an integer number (21031).

2⁴²⁰⁶¹ is an apocalyptic number.

It is an amenable number.

42061 is a deficient number, since it is larger than the sum of its proper divisors (1).

42061 is an equidigital number, since it uses as much as digits as its factorization.

42061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 42061 is about 205.0877860820. The cubic root of 42061 is about 34.7770866913. Note that the first 3 decimals are identical.

Adding to 42061 its reverse (16024), we get a palindrome (58085).

The spelling of 42061 in words is "forty-two thousand, sixty-one".