131072506 has 8 divisors (see below), whose sum is σ = 197237844. Its totient is φ = 65326560.

The previous prime is 131072503. The next prime is 131072527. The reversal of 131072506 is 605270131.

It can be written as a sum of positive squares in 2 ways, for example, as 120890025 + 10182481 = 10995^2 + 3191^2 .

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 (131072503) 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, 104065 + ... + 105316.

Almost surely, 2^131072506 is an apocalyptic number.

131072506 is a deficient number, since it is larger than the sum of its proper divisors (66165338).

131072506 is a wasteful number, since it uses less digits than its factorization.

131072506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209696.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 131072506 is about 11448.6901434182. The cubic root of 131072506 is about 507.9689902951.

The spelling of 131072506 in words is "one hundred thirty-one million, seventy-two thousand, five hundred six".