806425 has 6 divisors (see below), whose sum is σ = 999998. Its totient is φ = 645120.

The previous prime is 806389. The next prime is 806447. The reversal of 806425 is 524608.

It can be written as a sum of positive squares in 3 ways, for example, as 12544 + 793881 = 112^2 + 891^2 .

It is not a de Polignac number, because 806425 - 2⁷ = 806297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 32257 = 806425 / (8 + 0 + 6 + 4 + 2 + 5).

It is a Duffinian number.

806425 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 806425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16104 + ... + 16153.

2⁸⁰⁶⁴²⁵ is an apocalyptic number.

It is an amenable number.

806425 is a deficient number, since it is larger than the sum of its proper divisors (193573).

806425 is a wasteful number, since it uses less digits than its factorization.

806425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32267 (or 32262 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 806425 is about 898.0116925742. The cubic root of 806425 is about 93.0796327226.

The spelling of 806425 in words is "eight hundred six thousand, four hundred twenty-five".