131504641 has 2 divisors, whose sum is σ = 131504642. Its totient is φ = 131504640.

The previous prime is 131504627. The next prime is 131504663. The reversal of 131504641 is 146405131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97911025 + 33593616 = 9895^2 + 5796^2 .

It is an emirp because it is prime and its reverse (146405131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131504641 is a prime.

It is not a weakly prime, because it can be changed into another prime (131504441) 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, 65752320 + 65752321.

It is an arithmetic number, because the mean of its divisors is an integer number (65752321).

Almost surely, 2^131504641 is an apocalyptic number.

It is an amenable number.

131504641 is a deficient number, since it is larger than the sum of its proper divisors (1).

131504641 is an equidigital number, since it uses as much as digits as its factorization.

131504641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 131504641 is about 11467.5472966106. The cubic root of 131504641 is about 508.5266215650.

Adding to 131504641 its reverse (146405131), we get a palindrome (277909772).

The spelling of 131504641 in words is "one hundred thirty-one million, five hundred four thousand, six hundred forty-one".