1660589 has 8 divisors (see below), whose sum is σ = 1911168. Its totient is φ = 1413360.

The previous prime is 1660573. The next prime is 1660601. The reversal of 1660589 is 9850661.

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

It is a cyclic number.

It is not a de Polignac number, because 1660589 - 2⁴ = 1660573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660559) 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, 344 + ... + 1854.

It is an arithmetic number, because the mean of its divisors is an integer number (238896).

2^1660589 is an apocalyptic number.

It is an amenable number.

1660589 is a deficient number, since it is larger than the sum of its proper divisors (250579).

1660589 is a wasteful number, since it uses less digits than its factorization.

1660589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1660589 is about 1288.6384287301. The cubic root of 1660589 is about 118.4188172019.

The spelling of 1660589 in words is "one million, six hundred sixty thousand, five hundred eighty-nine".