1659459 has 4 divisors (see below), whose sum is σ = 2212616. Its totient is φ = 1106304.

The previous prime is 1659457. The next prime is 1659491. The reversal of 1659459 is 9549561.

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

It is not a de Polignac number, because 1659459 - 2¹ = 1659457 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1659451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276574 + ... + 276579.

It is an arithmetic number, because the mean of its divisors is an integer number (553154).

2^1659459 is an apocalyptic number.

1659459 is a deficient number, since it is larger than the sum of its proper divisors (553157).

1659459 is an equidigital number, since it uses as much as digits as its factorization.

1659459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553156.

The product of its digits is 48600, while the sum is 39.

The square root of 1659459 is about 1288.1999068468. The cubic root of 1659459 is about 118.3919505043.

It can be divided in two parts, 16594 and 59, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 1659459 in words is "one million, six hundred fifty-nine thousand, four hundred fifty-nine".