1659040 has 24 divisors (see below), whose sum is σ = 3919860. Its totient is φ = 663552.

The previous prime is 1659029. The next prime is 1659041. The reversal of 1659040 is 409561.

It can be written as a sum of positive squares in 2 ways, for example, as 1468944 + 190096 = 1212^2 + 436^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1658996 and 1659014.

It is not an unprimeable number, because it can be changed into a prime (1659041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5025 + ... + 5344.

2^1659040 is an apocalyptic number.

1659040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1659040 is an abundant number, since it is smaller than the sum of its proper divisors (2260820).

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

1659040 is a wasteful number, since it uses less digits than its factorization.

1659040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384 (or 10376 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1659040 is about 1288.0372665416. The cubic root of 1659040 is about 118.3819853283.

The spelling of 1659040 in words is "one million, six hundred fifty-nine thousand, forty".