131128612 has 12 divisors (see below), whose sum is σ = 239452416. Its totient is φ = 62713640.

The previous prime is 131128609. The next prime is 131128651. The reversal of 131128612 is 216821131.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712564 + ... + 712747.

It is an arithmetic number, because the mean of its divisors is an integer number (19954368).

Almost surely, 2^131128612 is an apocalyptic number.

It is an amenable number.

131128612 is a deficient number, since it is larger than the sum of its proper divisors (108323804).

131128612 is a wasteful number, since it uses less digits than its factorization.

131128612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425338 (or 1425336 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 131128612 is about 11451.1402052372. The cubic root of 131128612 is about 508.0414591992.

Adding to 131128612 its reverse (216821131), we get a palindrome (347949743).

The spelling of 131128612 in words is "one hundred thirty-one million, one hundred twenty-eight thousand, six hundred twelve".