821416061 has 8 divisors (see below), whose sum is σ = 828579840. Its totient is φ = 814263408.

The previous prime is 821416051. The next prime is 821416067. The reversal of 821416061 is 160614128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-821416061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821416067) 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 in 7 ways as a sum of consecutive naturals, for example, 221555 + ... + 225231.

It is an arithmetic number, because the mean of its divisors is an integer number (103572480).

Almost surely, 2^821416061 is an apocalyptic number.

It is an amenable number.

821416061 is a deficient number, since it is larger than the sum of its proper divisors (7163779).

821416061 is a wasteful number, since it uses less digits than its factorization.

821416061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 821416061 is about 28660.3569586982. The cubic root of 821416061 is about 936.5286407447.

The spelling of 821416061 in words is "eight hundred twenty-one million, four hundred sixteen thousand, sixty-one".