131140906 has 8 divisors (see below), whose sum is σ = 211843044. Its totient is φ = 60526560.

The previous prime is 131140903. The next prime is 131140937. The reversal of 131140906 is 609041131.

It can be written as a sum of positive squares in 2 ways, for example, as 130988025 + 152881 = 11445^2 + 391^2 .

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 (131140901) 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, 2521915 + ... + 2521966.

Almost surely, 2^131140906 is an apocalyptic number.

131140906 is a deficient number, since it is larger than the sum of its proper divisors (80702138).

131140906 is a wasteful number, since it uses less digits than its factorization.

131140906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043896.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 131140906 is about 11451.6769950955. The cubic root of 131140906 is about 508.0573358932.

The spelling of 131140906 in words is "one hundred thirty-one million, one hundred forty thousand, nine hundred six".