131073 has 4 divisors (see below), whose sum is σ = 174768. Its totient is φ = 87380.

The previous prime is 131071. The next prime is 131101. The reversal of 131073 is 370131.

131073 is nontrivially palindromic in base 2.

It is a Cunningham number, because it is equal to 2¹⁷+1.

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, and also an emirpimes, since its reverse is a distinct semiprime: 370131 = 3 ⋅123377.

It is a cyclic number.

It is not a de Polignac number, because 131073 - 2¹ = 131071 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (2) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21843 + ... + 21848.

It is an arithmetic number, because the mean of its divisors is an integer number (43692).

131073 is a Friedman number, since it can be written as (3-3^0)^17+1, using all its digits and the basic arithmetic operations.

It is a Proth number, since it is equal to 1 ⋅ 2¹⁷ + 1 and 1 < 2¹⁷.

2¹³¹⁰⁷³ is an apocalyptic number.

It is an amenable number.

131073 is a deficient number, since it is larger than the sum of its proper divisors (43695).

131073 is an equidigital number, since it uses as much as digits as its factorization.

131073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43694.

The product of its (nonzero) digits is 63, while the sum is 15.

The square root of 131073 is about 362.0400530328. The cubic root of 131073 is about 50.7969628457.

The spelling of 131073 in words is "one hundred thirty-one thousand, seventy-three".