131906 has 8 divisors (see below), whose sum is σ = 200124. Its totient is φ = 65200.

The previous prime is 131899. The next prime is 131909. The reversal of 131906 is 609131.

It can be written as a sum of positive squares in 2 ways, for example, as 128881 + 3025 = 359^2 + 55^2 .

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

It is not an unprimeable number, because it can be changed into a prime (131909) 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, 125 + ... + 528.

2¹³¹⁹⁰⁶ is an apocalyptic number.

131906 is a deficient number, since it is larger than the sum of its proper divisors (68218).

131906 is a wasteful number, since it uses less digits than its factorization.

131906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 131906 is about 363.1886562105. The cubic root of 131906 is about 50.9043446023.

The spelling of 131906 in words is "one hundred thirty-one thousand, nine hundred six".