131506 has 8 divisors (see below), whose sum is σ = 201600. Its totient is φ = 64308.

The previous prime is 131501. The next prime is 131507. The reversal of 131506 is 605131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 131506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131501) by changing a digit.

131506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606 + ... + 793.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2¹³¹⁵⁰⁶ is an apocalyptic number.

131506 is a deficient number, since it is larger than the sum of its proper divisors (70094).

131506 is a wasteful number, since it uses less digits than its factorization.

131506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 131506 is about 362.6375601065. The cubic root of 131506 is about 50.8528373304.

Adding to 131506 its reverse (605131), we get a palindrome (736637).

The spelling of 131506 in words is "one hundred thirty-one thousand, five hundred six".