131247732 has 144 divisors (see below), whose sum is σ = 396233600. Its totient is φ = 33073920.

The previous prime is 131247731. The next prime is 131247749. The reversal of 131247732 is 237742131.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 131247732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131247731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 375894 + ... + 376242.

Almost surely, 2^131247732 is an apocalyptic number.

131247732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131247732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198116800).

131247732 is an abundant number, since it is smaller than the sum of its proper divisors (264985868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131247732 is a wasteful number, since it uses less digits than its factorization.

131247732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 409 counting only the distinct ones).

The product of its digits is 7056, while the sum is 30.

The square root of 131247732 is about 11456.3402533270. The cubic root of 131247732 is about 508.1952511691.

Adding to 131247732 its reverse (237742131), we get a palindrome (368989863).

The spelling of 131247732 in words is "one hundred thirty-one million, two hundred forty-seven thousand, seven hundred thirty-two".