131366 has 8 divisors (see below), whose sum is σ = 207480. Its totient is φ = 62208.

The previous prime is 131363. The next prime is 131371. The reversal of 131366 is 663131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691 + ... + 1766.

It is an arithmetic number, because the mean of its divisors is an integer number (25935).

2¹³¹³⁶⁶ is an apocalyptic number.

131366 is a deficient number, since it is larger than the sum of its proper divisors (76114).

131366 is a wasteful number, since it uses less digits than its factorization.

131366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478.

The product of its digits is 324, while the sum is 20.

The square root of 131366 is about 362.4444785067. Note that the first 4 decimals coincide. The cubic root of 131366 is about 50.8347851119.

Adding to 131366 its reverse (663131), we get a palindrome (794497).

The spelling of 131366 in words is "one hundred thirty-one thousand, three hundred sixty-six".