131232605 has 16 divisors (see below), whose sum is σ = 190563840. Its totient is φ = 84694272.

The previous prime is 131232593. The next prime is 131232613. The reversal of 131232605 is 506232131.

It is a de Polignac number, because none of the positive numbers 2^k-131232605 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109685 + ... + 110874.

It is an arithmetic number, because the mean of its divisors is an integer number (11910240).

Almost surely, 2^131232605 is an apocalyptic number.

It is an amenable number.

131232605 is a deficient number, since it is larger than the sum of its proper divisors (59331235).

131232605 is a wasteful number, since it uses less digits than its factorization.

131232605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220588.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 131232605 is about 11455.6800321936. The cubic root of 131232605 is about 508.1757263493.

Adding to 131232605 its reverse (506232131), we get a palindrome (637464736).

The spelling of 131232605 in words is "one hundred thirty-one million, two hundred thirty-two thousand, six hundred five".