1685201 has 4 divisors (see below), whose sum is σ = 1925952. Its totient is φ = 1444452.

The previous prime is 1685179. The next prime is 1685207. The reversal of 1685201 is 1025861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685201 is a prime.

It is a plaindrome in base 15.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1685207) 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, 120365 + ... + 120378.

It is an arithmetic number, because the mean of its divisors is an integer number (481488).

2^1685201 is an apocalyptic number.

It is an amenable number.

1685201 is a deficient number, since it is larger than the sum of its proper divisors (240751).

1685201 is an equidigital number, since it uses as much as digits as its factorization.

1685201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240750.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1685201 is about 1298.1529185732. The cubic root of 1685201 is about 119.0009886225. Note that the first 3 decimals are identical.

The spelling of 1685201 in words is "one million, six hundred eighty-five thousand, two hundred one".