999458 has 4 divisors (see below), whose sum is σ = 1499190. Its totient is φ = 499728.

The previous prime is 999451. The next prime is 999491. The reversal of 999458 is 854999.

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

It can be written as a sum of positive squares in only one way, i.e., 573049 + 426409 = 757^2 + 653^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999458.

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

999458 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 249863 + ... + 249866.

2⁹⁹⁹⁴⁵⁸ is an apocalyptic number.

999458 is a deficient number, since it is larger than the sum of its proper divisors (499732).

999458 is a wasteful number, since it uses less digits than its factorization.

999458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499731.

The product of its digits is 116640, while the sum is 44.

The square root of 999458 is about 999.7289632695. The cubic root of 999458 is about 99.9819300683.

The spelling of 999458 in words is "nine hundred ninety-nine thousand, four hundred fifty-eight".