1680255 has 12 divisors (see below), whose sum is σ = 2912520. Its totient is φ = 896112.

The previous prime is 1680253. The next prime is 1680269. The reversal of 1680255 is 5520861.

It is not a de Polignac number, because 1680255 - 2¹ = 1680253 is a prime.

1680255 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18625 + ... + 18714.

It is an arithmetic number, because the mean of its divisors is an integer number (242710).

2^1680255 is an apocalyptic number.

1680255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1680255 is a deficient number, since it is larger than the sum of its proper divisors (1232265).

1680255 is a wasteful number, since it uses less digits than its factorization.

1680255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37350 (or 37347 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1680255 is about 1296.2465043347. The cubic root of 1680255 is about 118.8844534339.

Subtracting 1680255 from its reverse (5520861), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1680255 in words is "one million, six hundred eighty thousand, two hundred fifty-five".