131247436 has 12 divisors (see below), whose sum is σ = 235890928. Its totient is φ = 63850032.

The previous prime is 131247427. The next prime is 131247449. The reversal of 131247436 is 634742131.

It is a junction number, because it is equal to n+sod(n) for n = 131247398 and 131247407.

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, 443256 + ... + 443551.

Almost surely, 2^131247436 is an apocalyptic number.

It is an amenable number.

131247436 is a deficient number, since it is larger than the sum of its proper divisors (104643492).

131247436 is a wasteful number, since it uses less digits than its factorization.

131247436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886848 (or 886846 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 131247436 is about 11456.3273347090. The cubic root of 131247436 is about 508.1948691284.

Adding to 131247436 its reverse (634742131), we get a palindrome (765989567).

The spelling of 131247436 in words is "one hundred thirty-one million, two hundred forty-seven thousand, four hundred thirty-six".