1678201 has 12 divisors (see below), whose sum is σ = 2021220. Its totient is φ = 1387680.

The previous prime is 1678199. The next prime is 1678207. The reversal of 1678201 is 1028761.

It can be written as a sum of positive squares in 2 ways, for example, as 1254400 + 423801 = 1120^2 + 651^2 .

It is not a de Polignac number, because 1678201 - 2¹ = 1678199 is a prime.

It is a Duffinian number.

1678201 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1678207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 831 + ... + 2011.

It is an arithmetic number, because the mean of its divisors is an integer number (168435).

2^1678201 is an apocalyptic number.

It is an amenable number.

1678201 is a deficient number, since it is larger than the sum of its proper divisors (343019).

1678201 is a wasteful number, since it uses less digits than its factorization.

1678201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1678201 is about 1295.4539744815. The cubic root of 1678201 is about 118.8359909016.

The spelling of 1678201 in words is "one million, six hundred seventy-eight thousand, two hundred one".