521256241 has 16 divisors (see below), whose sum is σ = 601263360. Its totient is φ = 446910480.

The previous prime is 521256217. The next prime is 521256251. The reversal of 521256241 is 142652125.

It is a cyclic number.

It is not a de Polignac number, because 521256241 - 2⁹ = 521255729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521256251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41950 + ... + 52936.

It is an arithmetic number, because the mean of its divisors is an integer number (37578960).

Almost surely, 2^521256241 is an apocalyptic number.

It is an amenable number.

521256241 is a deficient number, since it is larger than the sum of its proper divisors (80007119).

521256241 is a wasteful number, since it uses less digits than its factorization.

521256241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11244.

The product of its digits is 4800, while the sum is 28.

The square root of 521256241 is about 22831.0367920513. The cubic root of 521256241 is about 804.7921951171.

The spelling of 521256241 in words is "five hundred twenty-one million, two hundred fifty-six thousand, two hundred forty-one".