71142 has 16 divisors (see below), whose sum is σ = 145152. Its totient is φ = 23240.

The previous prime is 71129. The next prime is 71143. The reversal of 71142 is 24117.

It is a super-2 number, since 2×71142² = 10122368328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71143) by changing a digit.

71142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343 + ... + 509.

It is an arithmetic number, because the mean of its divisors is an integer number (9072).

2⁷¹¹⁴² is an apocalyptic number.

71142 is an abundant number, since it is smaller than the sum of its proper divisors (74010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72576).

71142 is a wasteful number, since it uses less digits than its factorization.

71142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243.

The product of its digits is 56, while the sum is 15.

The square root of 71142 is about 266.7245770453. The cubic root of 71142 is about 41.4357645627.

Adding to 71142 its reverse (24117), we get a palindrome (95259).

The spelling of 71142 in words is "seventy-one thousand, one hundred forty-two", and thus it is an iban number.