521240141 has 2 divisors, whose sum is σ = 521240142. Its totient is φ = 521240140.

The previous prime is 521240087. The next prime is 521240173. The reversal of 521240141 is 141042125.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422138116 + 99102025 = 20546^2 + 9955^2 .

It is a cyclic number.

It is not a de Polignac number, because 521240141 - 2²⁶ = 454131277 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 (521240441) 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, 260620070 + 260620071.

It is an arithmetic number, because the mean of its divisors is an integer number (260620071).

Almost surely, 2^521240141 is an apocalyptic number.

It is an amenable number.

521240141 is a deficient number, since it is larger than the sum of its proper divisors (1).

521240141 is an equidigital number, since it uses as much as digits as its factorization.

521240141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 521240141 is about 22830.6841991211. The cubic root of 521240141 is about 804.7839091810.

Adding to 521240141 its reverse (141042125), we get a palindrome (662282266).

The spelling of 521240141 in words is "five hundred twenty-one million, two hundred forty thousand, one hundred forty-one".