1680265 has 16 divisors (see below), whose sum is σ = 2217600. Its totient is φ = 1216512.

The previous prime is 1680253. The next prime is 1680269. The reversal of 1680265 is 5620861.

It is a cyclic number.

It is not a de Polignac number, because 1680265 - 2¹¹ = 1678217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1680269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1801 + ... + 2569.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

2^1680265 is an apocalyptic number.

It is an amenable number.

1680265 is a deficient number, since it is larger than the sum of its proper divisors (537335).

1680265 is a wasteful number, since it uses less digits than its factorization.

1680265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1680265 is about 1296.2503616200. The cubic root of 1680265 is about 118.8846892795.

The spelling of 1680265 in words is "one million, six hundred eighty thousand, two hundred sixty-five".