1659842 has 6 divisors (see below), whose sum is σ = 2492499. Its totient is φ = 829010.

The previous prime is 1659817. The next prime is 1659851. The reversal of 1659842 is 2489561.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 829921 = 911^2 + 911^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=911.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1367 + ... + 2277.

2^1659842 is an apocalyptic number.

1659842 is a deficient number, since it is larger than the sum of its proper divisors (832657).

1659842 is an frugal number, since it uses more digits than its factorization.

1659842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 913 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 1659842 is about 1288.3485553219. The cubic root of 1659842 is about 118.4010580165.

The spelling of 1659842 in words is "one million, six hundred fifty-nine thousand, eight hundred forty-two".