42261 has 4 divisors (see below), whose sum is σ = 56352. Its totient is φ = 28172.

The previous prime is 42257. The next prime is 42281. The reversal of 42261 is 16224.

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 a cyclic number.

It is not a de Polignac number, because 42261 - 2² = 42257 is a prime.

It is a d-powerful number, because it can be written as 4 + 2¹³ + 2¹⁵ + 6⁴ + 1 .

It is a D-number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 42261.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42261.

It is not an unprimeable number, because it can be changed into a prime (42221) 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 in 3 ways as a sum of consecutive naturals, for example, 7041 + ... + 7046.

It is an arithmetic number, because the mean of its divisors is an integer number (14088).

2⁴²²⁶¹ is an apocalyptic number.

It is an amenable number.

42261 is a deficient number, since it is larger than the sum of its proper divisors (14091).

42261 is a wasteful number, since it uses less digits than its factorization.

42261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14090.

The product of its digits is 96, while the sum is 15.

The square root of 42261 is about 205.5748039036. The cubic root of 42261 is about 34.8321212208.

Adding to 42261 its reverse (16224), we get a palindrome (58485).

It can be divided in two parts, 42 and 261, that added together give a palindrome (303).

The spelling of 42261 in words is "forty-two thousand, two hundred sixty-one".