131128541 has 2 divisors, whose sum is σ = 131128542. Its totient is φ = 131128540.

The previous prime is 131128507. The next prime is 131128553. The reversal of 131128541 is 145821131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98922916 + 32205625 = 9946^2 + 5675^2 .

It is an emirp because it is prime and its reverse (145821131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131128541 - 2¹⁸ = 130866397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131128541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131128141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65564270 + 65564271.

It is an arithmetic number, because the mean of its divisors is an integer number (65564271).

Almost surely, 2^131128541 is an apocalyptic number.

It is an amenable number.

131128541 is a deficient number, since it is larger than the sum of its proper divisors (1).

131128541 is an equidigital number, since it uses as much as digits as its factorization.

131128541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 26.

The square root of 131128541 is about 11451.1371051088. The cubic root of 131128541 is about 508.0413675057.

Adding to 131128541 its reverse (145821131), we get a palindrome (276949672).

The spelling of 131128541 in words is "one hundred thirty-one million, one hundred twenty-eight thousand, five hundred forty-one".