61071 has 4 divisors (see below), whose sum is σ = 81432. Its totient is φ = 40712.

The previous prime is 61057. The next prime is 61091. The reversal of 61071 is 17016.

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 61071 - 2⁶ = 61007 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 61071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10176 + ... + 10181.

It is an arithmetic number, because the mean of its divisors is an integer number (20358).

2⁶¹⁰⁷¹ is an apocalyptic number.

61071 is a deficient number, since it is larger than the sum of its proper divisors (20361).

61071 is a wasteful number, since it uses less digits than its factorization.

61071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20360.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 61071 is about 247.1254742029. The cubic root of 61071 is about 39.3802386580.

Adding to 61071 its reverse (17016), we get a palindrome (78087).

The spelling of 61071 in words is "sixty-one thousand, seventy-one".