131130242 has 4 divisors (see below), whose sum is σ = 196695366. Its totient is φ = 65565120.

The previous prime is 131130239. The next prime is 131130247. The reversal of 131130242 is 242031131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81018001 + 50112241 = 9001^2 + 7079^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131130242.

It is not an unprimeable number, because it can be changed into a prime (131130247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32782559 + ... + 32782562.

Almost surely, 2^131130242 is an apocalyptic number.

131130242 is a deficient number, since it is larger than the sum of its proper divisors (65565124).

131130242 is an equidigital number, since it uses as much as digits as its factorization.

131130242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65565123.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131130242 is about 11451.2113769679. The cubic root of 131130242 is about 508.0435642678.

Adding to 131130242 its reverse (242031131), we get a palindrome (373161373).

The spelling of 131130242 in words is "one hundred thirty-one million, one hundred thirty thousand, two hundred forty-two".