1680471 has 24 divisors (see below), whose sum is σ = 2673216. Its totient is φ = 1010880.

The previous prime is 1680461. The next prime is 1680491. The reversal of 1680471 is 1740861.

It is a happy number.

It is not a de Polignac number, because 1680471 - 2⁵ = 1680439 is a prime.

It is a super-3 number, since 3×1680471³ = 14236863508149381333, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6066 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (111384).

2^1680471 is an apocalyptic number.

1680471 is a deficient number, since it is larger than the sum of its proper divisors (992745).

1680471 is a wasteful number, since it uses less digits than its factorization.

1680471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1680471 is about 1296.3298191433. The cubic root of 1680471 is about 118.8895474904.

The spelling of 1680471 in words is "one million, six hundred eighty thousand, four hundred seventy-one".