131251492 has 24 divisors (see below), whose sum is σ = 244240920. Its totient is φ = 61501440.

The previous prime is 131251481. The next prime is 131251493. The reversal of 131251492 is 294152131.

It can be written as a sum of positive squares in 4 ways, for example, as 60590656 + 70660836 = 7784^2 + 8406^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131251492.

It is not an unprimeable number, because it can be changed into a prime (131251493) 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, 12384 + ... + 20392.

It is an arithmetic number, because the mean of its divisors is an integer number (10176705).

Almost surely, 2^131251492 is an apocalyptic number.

It is an amenable number.

131251492 is a deficient number, since it is larger than the sum of its proper divisors (112989428).

131251492 is a wasteful number, since it uses less digits than its factorization.

131251492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8271 (or 8269 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 131251492 is about 11456.5043534230. The cubic root of 131251492 is about 508.2001040679.

The spelling of 131251492 in words is "one hundred thirty-one million, two hundred fifty-one thousand, four hundred ninety-two".