521246441 has 2 divisors, whose sum is σ = 521246442. Its totient is φ = 521246440.

The previous prime is 521246423. The next prime is 521246443. The reversal of 521246441 is 144642125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403849216 + 117397225 = 20096^2 + 10835^2 .

It is a cyclic number.

It is not a de Polignac number, because 521246441 - 2¹⁴ = 521230057 is a prime.

Together with 521246443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521246443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260623220 + 260623221.

It is an arithmetic number, because the mean of its divisors is an integer number (260623221).

Almost surely, 2^521246441 is an apocalyptic number.

It is an amenable number.

521246441 is a deficient number, since it is larger than the sum of its proper divisors (1).

521246441 is an equidigital number, since it uses as much as digits as its factorization.

521246441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 521246441 is about 22830.8221709162. The cubic root of 521246441 is about 804.7871515242.

Adding to 521246441 its reverse (144642125), we get a palindrome (665888566).

The spelling of 521246441 in words is "five hundred twenty-one million, two hundred forty-six thousand, four hundred forty-one".