999459 has 16 divisors (see below), whose sum is σ = 1502240. Its totient is φ = 664848.

The previous prime is 999451. The next prime is 999491. The reversal of 999459 is 954999.

It is a happy number.

It is not a de Polignac number, because 999459 - 2³ = 999451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1959 + ... + 2415.

It is an arithmetic number, because the mean of its divisors is an integer number (93890).

2⁹⁹⁹⁴⁵⁹ is an apocalyptic number.

999459 is a deficient number, since it is larger than the sum of its proper divisors (502781).

999459 is an frugal number, since it uses more digits than its factorization.

999459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 460 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 999459 is about 999.7294634050. The cubic root of 999459 is about 99.9819634137.

The spelling of 999459 in words is "nine hundred ninety-nine thousand, four hundred fifty-nine".