521296961 has 4 divisors (see below), whose sum is σ = 538113024. Its totient is φ = 504480900.

The previous prime is 521296957. The next prime is 521296987. The reversal of 521296961 is 169692125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521296961 - 2² = 521296957 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521296261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8407985 + ... + 8408046.

It is an arithmetic number, because the mean of its divisors is an integer number (134528256).

Almost surely, 2^521296961 is an apocalyptic number.

It is an amenable number.

521296961 is a deficient number, since it is larger than the sum of its proper divisors (16816063).

521296961 is a wasteful number, since it uses less digits than its factorization.

521296961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16816062.

The product of its digits is 58320, while the sum is 41.

The square root of 521296961 is about 22831.9285431608. The cubic root of 521296961 is about 804.8131510836.

The spelling of 521296961 in words is "five hundred twenty-one million, two hundred ninety-six thousand, nine hundred sixty-one".