131186426 has 12 divisors (see below), whose sum is σ = 228907098. Its totient is φ = 56222712.

The previous prime is 131186381. The next prime is 131186453. The reversal of 131186426 is 624681131.

It can be written as a sum of positive squares in only one way, i.e., 113955625 + 17230801 = 10675^2 + 4151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131186392 and 131186401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 669221 + ... + 669416.

Almost surely, 2^131186426 is an apocalyptic number.

131186426 is a deficient number, since it is larger than the sum of its proper divisors (97720672).

131186426 is a wasteful number, since it uses less digits than its factorization.

131186426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338653 (or 1338646 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 131186426 is about 11453.6643044923. The cubic root of 131186426 is about 508.1161126073.

The spelling of 131186426 in words is "one hundred thirty-one million, one hundred eighty-six thousand, four hundred twenty-six".