131020 has 12 divisors (see below), whose sum is σ = 275184. Its totient is φ = 52400.

The previous prime is 131011. The next prime is 131023. The reversal of 131020 is 20131.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 130994 and 131012.

It is not an unprimeable number, because it can be changed into a prime (131023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3256 + ... + 3295.

It is an arithmetic number, because the mean of its divisors is an integer number (22932).

2¹³¹⁰²⁰ is an apocalyptic number.

131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131020 is an abundant number, since it is smaller than the sum of its proper divisors (144164).

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

131020 is a wasteful number, since it uses less digits than its factorization.

131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560 (or 6558 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 131020 is about 361.9668493108. The cubic root of 131020 is about 50.7901152570.

Adding to 131020 its reverse (20131), we get a palindrome (151151).

Subtracting from 131020 its reverse (20131), we obtain a square (110889 = 333²).

The spelling of 131020 in words is "one hundred thirty-one thousand, twenty".