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1680007 = 71072243
BaseRepresentation
bin110011010001010000111
310011100112111
412122022013
5412230012
6100001451
720164660
oct6321207
93140474
101680007
11a4823a
12690287
1346a8b4
1431a367
15232ba7
hex19a287

1680007 has 8 divisors (see below), whose sum is σ = 1938816. Its totient is φ = 1425912.

The previous prime is 1679981. The next prime is 1680013. The reversal of 1680007 is 7000861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1680007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1680007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373 + ... + 1870.

It is an arithmetic number, because the mean of its divisors is an integer number (242352).

21680007 is an apocalyptic number.

1680007 is a deficient number, since it is larger than the sum of its proper divisors (258809).

1680007 is a wasteful number, since it uses less digits than its factorization.

1680007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1680007 is about 1296.1508399874. The cubic root of 1680007 is about 118.8786041640.

Adding to 1680007 its reverse (7000861), we get a palindrome (8680868).

The spelling of 1680007 in words is "one million, six hundred eighty thousand, seven".

Divisors: 1 7 107 749 2243 15701 240001 1680007