131247256 has 32 divisors (see below), whose sum is σ = 281629440. Its totient is φ = 56171808.

The previous prime is 131247253. The next prime is 131247271. The reversal of 131247256 is 652742131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131247253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61845 + ... + 63931.

It is an arithmetic number, because the mean of its divisors is an integer number (8800920).

Almost surely, 2^131247256 is an apocalyptic number.

It is an amenable number.

131247256 is an abundant number, since it is smaller than the sum of its proper divisors (150382184).

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

131247256 is a wasteful number, since it uses less digits than its factorization.

131247256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223 (or 3219 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 131247256 is about 11456.3194787855. The cubic root of 131247256 is about 508.1946368061.

Adding to 131247256 its reverse (652742131), we get a palindrome (783989387).

The spelling of 131247256 in words is "one hundred thirty-one million, two hundred forty-seven thousand, two hundred fifty-six".