71523 has 10 divisors (see below), whose sum is σ = 106964. Its totient is φ = 47628.

The previous prime is 71503. The next prime is 71527. The reversal of 71523 is 32517.

It is not a de Polignac number, because 71523 - 2⁹ = 71011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71496 and 71505.

It is not an unprimeable number, because it can be changed into a prime (71527) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 361 + ... + 522.

2⁷¹⁵²³ is an apocalyptic number.

71523 is a deficient number, since it is larger than the sum of its proper divisors (35441).

71523 is an equidigital number, since it uses as much as digits as its factorization.

71523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 886 counting only the distinct ones).

The product of its digits is 210, while the sum is 18.

The square root of 71523 is about 267.4378432459. The cubic root of 71523 is about 41.5096024618.

The spelling of 71523 in words is "seventy-one thousand, five hundred twenty-three".