806452591 has 4 divisors (see below), whose sum is σ = 921660112. Its totient is φ = 691245072.

The previous prime is 806452589. The next prime is 806452609. The reversal of 806452591 is 195254608.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 806452591 - 2¹ = 806452589 is a prime.

It is a super-2 number, since 2×806452591² = 1300731563061226562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806452501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57603750 + ... + 57603763.

It is an arithmetic number, because the mean of its divisors is an integer number (230415028).

Almost surely, 2^806452591 is an apocalyptic number.

806452591 is a deficient number, since it is larger than the sum of its proper divisors (115207521).

806452591 is a wasteful number, since it uses less digits than its factorization.

806452591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115207520.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 806452591 is about 28398.1089335188. The cubic root of 806452591 is about 930.8069425169.

The spelling of 806452591 in words is "eight hundred six million, four hundred fifty-two thousand, five hundred ninety-one".