1659140 has 36 divisors (see below), whose sum is σ = 4055436. Its totient is φ = 568512.

The previous prime is 1659131. The next prime is 1659169. The reversal of 1659140 is 419561.

It can be written as a sum of positive squares in 2 ways, for example, as 614656 + 1044484 = 784^2 + 1022^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 134 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (112651).

2^1659140 is an apocalyptic number.

1659140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1659140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2027718).

1659140 is an abundant number, since it is smaller than the sum of its proper divisors (2396296).

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

1659140 is a wasteful number, since it uses less digits than its factorization.

1659140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716 (or 1707 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1659140 is about 1288.0760847093. The cubic root of 1659140 is about 118.3843638044.

The spelling of 1659140 in words is "one million, six hundred fifty-nine thousand, one hundred forty".