806462521 has 2 divisors, whose sum is σ = 806462522. Its totient is φ = 806462520.

The previous prime is 806462491. The next prime is 806462557. The reversal of 806462521 is 125264608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804516496 + 1946025 = 28364^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 806462521 - 2¹³ = 806454329 is a prime.

It is a super-4 number, since 4×806462521⁴ (a number of 37 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (806462221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403231260 + 403231261.

It is an arithmetic number, because the mean of its divisors is an integer number (403231261).

Almost surely, 2^806462521 is an apocalyptic number.

It is an amenable number.

806462521 is a deficient number, since it is larger than the sum of its proper divisors (1).

806462521 is an equidigital number, since it uses as much as digits as its factorization.

806462521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 806462521 is about 28398.2837685660. The cubic root of 806462521 is about 930.8107629006.

The spelling of 806462521 in words is "eight hundred six million, four hundred sixty-two thousand, five hundred twenty-one".