521056141 has 2 divisors, whose sum is σ = 521056142. Its totient is φ = 521056140.

The previous prime is 521056139. The next prime is 521056169. The reversal of 521056141 is 141650125.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283248900 + 237807241 = 16830^2 + 15421^2 .

It is a cyclic number.

It is not a de Polignac number, because 521056141 - 2¹ = 521056139 is a prime.

Together with 521056139, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521056111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260528070 + 260528071.

It is an arithmetic number, because the mean of its divisors is an integer number (260528071).

Almost surely, 2^521056141 is an apocalyptic number.

It is an amenable number.

521056141 is a deficient number, since it is larger than the sum of its proper divisors (1).

521056141 is an equidigital number, since it uses as much as digits as its factorization.

521056141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 521056141 is about 22826.6541788323. The cubic root of 521056141 is about 804.6892006482.

The spelling of 521056141 in words is "five hundred twenty-one million, fifty-six thousand, one hundred forty-one".