71020 has 24 divisors (see below), whose sum is σ = 154224. Its totient is φ = 27456.

The previous prime is 71011. The next prime is 71023. The reversal of 71020 is 2017.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 70988 and 71006.

It is not an unprimeable number, because it can be changed into a prime (71023) 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, 1027 + ... + 1093.

It is an arithmetic number, because the mean of its divisors is an integer number (6426).

2⁷¹⁰²⁰ is an apocalyptic number.

It is an amenable number.

71020 is an abundant number, since it is smaller than the sum of its proper divisors (83204).

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 (77112).

71020 is a wasteful number, since it uses less digits than its factorization.

71020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 71020 is about 266.4957785782. The cubic root of 71020 is about 41.4120652210.

Adding to 71020 its reverse (2017), we get a palindrome (73037).

It can be divided in two parts, 7 and 1020, that multiplied together give a triangular number (7140 = T₁₁₉).

The spelling of 71020 in words is "seventy-one thousand, twenty", and thus it is an iban number.