133012541 has 2 divisors, whose sum is σ = 133012542. Its totient is φ = 133012540.

The previous prime is 133012489. The next prime is 133012549. The reversal of 133012541 is 145210331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132595225 + 417316 = 11515^2 + 646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133012541 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133012549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66506270 + 66506271.

It is an arithmetic number, because the mean of its divisors is an integer number (66506271).

Almost surely, 2^133012541 is an apocalyptic number.

It is an amenable number.

133012541 is a deficient number, since it is larger than the sum of its proper divisors (1).

133012541 is an equidigital number, since it uses as much as digits as its factorization.

133012541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 133012541 is about 11533.1063031605. The cubic root of 133012541 is about 510.4629155912.

Adding to 133012541 its reverse (145210331), we get a palindrome (278222872).

The spelling of 133012541 in words is "one hundred thirty-three million, twelve thousand, five hundred forty-one".