131026541 has 2 divisors, whose sum is σ = 131026542. Its totient is φ = 131026540.

The previous prime is 131026537. The next prime is 131026559. The reversal of 131026541 is 145620131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131010916 + 15625 = 11446^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 131026541 - 2² = 131026537 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131026501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65513270 + 65513271.

It is an arithmetic number, because the mean of its divisors is an integer number (65513271).

Almost surely, 2^131026541 is an apocalyptic number.

It is an amenable number.

131026541 is a deficient number, since it is larger than the sum of its proper divisors (1).

131026541 is an equidigital number, since it uses as much as digits as its factorization.

131026541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 131026541 is about 11446.6825325070. The cubic root of 131026541 is about 507.9096045265.

Adding to 131026541 its reverse (145620131), we get a palindrome (276646672).

The spelling of 131026541 in words is "one hundred thirty-one million, twenty-six thousand, five hundred forty-one".