Search a number
-
+
1680001 = 6127541
BaseRepresentation
bin110011010001010000001
310011100112021
412122022001
5412230001
6100001441
720164651
oct6321201
93140467
101680001
11a48234
12690281
1346a8ab
1431a361
15232ba1
hex19a281

1680001 has 4 divisors (see below), whose sum is σ = 1707604. Its totient is φ = 1652400.

The previous prime is 1679981. The next prime is 1680013. The reversal of 1680001 is 1000861.

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

It can be written as a sum of positive squares in 2 ways, for example, as 297025 + 1382976 = 545^2 + 1176^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680001 - 217 = 1548929 is a prime.

It is a Duffinian number.

1680001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1680071) 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, 13710 + ... + 13831.

It is an arithmetic number, because the mean of its divisors is an integer number (426901).

21680001 is an apocalyptic number.

It is an amenable number.

1680001 is a deficient number, since it is larger than the sum of its proper divisors (27603).

1680001 is an equidigital number, since it uses as much as digits as its factorization.

1680001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27602.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1680001 is about 1296.1485254399. The cubic root of 1680001 is about 118.8784626422.

Adding to 1680001 its reverse (1000861), we get a palindrome (2680862).

The spelling of 1680001 in words is "one million, six hundred eighty thousand, one".

Divisors: 1 61 27541 1680001