1665260 has 24 divisors (see below), whose sum is σ = 3565296. Its totient is φ = 653120.

The previous prime is 1665247. The next prime is 1665263. The reversal of 1665260 is 625661.

It is not an unprimeable number, because it can be changed into a prime (1665263) 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 7 ways as a sum of consecutive naturals, for example, 275 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (148554).

2^1665260 is an apocalyptic number.

1665260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665260 is an abundant number, since it is smaller than the sum of its proper divisors (1900036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665260 is a wasteful number, since it uses less digits than its factorization.

1665260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1665260 is about 1290.4495340772. The cubic root of 1665260 is about 118.5297450062.

The spelling of 1665260 in words is "one million, six hundred sixty-five thousand, two hundred sixty".