1660459 has 4 divisors (see below), whose sum is σ = 1701000. Its totient is φ = 1619920.

The previous prime is 1660457. The next prime is 1660469. The reversal of 1660459 is 9540661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1660459 - 2¹ = 1660457 is a prime.

It is a super-4 number, since 4×1660459⁴ (a number of 26 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660459.

It is not an unprimeable number, because it can be changed into a prime (1660457) 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 3 ways as a sum of consecutive naturals, for example, 20209 + ... + 20290.

It is an arithmetic number, because the mean of its divisors is an integer number (425250).

2^1660459 is an apocalyptic number.

1660459 is a deficient number, since it is larger than the sum of its proper divisors (40541).

1660459 is an equidigital number, since it uses as much as digits as its factorization.

1660459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40540.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1660459 is about 1288.5879869066. The cubic root of 1660459 is about 118.4157269634.

The spelling of 1660459 in words is "one million, six hundred sixty thousand, four hundred fifty-nine".