670825 has 6 divisors (see below), whose sum is σ = 831854. Its totient is φ = 536640.

The previous prime is 670823. The next prime is 670849. The reversal of 670825 is 528076.

670825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 64 + 670761 = 8^2 + 819^2 .

It is not a de Polignac number, because 670825 - 2¹ = 670823 is a prime.

It is a Duffinian number.

670825 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 670793 and 670802.

It is not an unprimeable number, because it can be changed into a prime (670823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13392 + ... + 13441.

2⁶⁷⁰⁸²⁵ is an apocalyptic number.

It is an amenable number.

670825 is a deficient number, since it is larger than the sum of its proper divisors (161029).

670825 is a wasteful number, since it uses less digits than its factorization.

670825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843 (or 26838 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 670825 is about 819.0390711071. The cubic root of 670825 is about 87.5393020721.

The spelling of 670825 in words is "six hundred seventy thousand, eight hundred twenty-five".