999441 has 6 divisors (see below), whose sum is σ = 1443650. Its totient is φ = 666288.

The previous prime is 999437. The next prime is 999451. The reversal of 999441 is 144999.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 77841 = 960^2 + 279^2 .

It is not a de Polignac number, because 999441 - 2² = 999437 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 999396 and 999405.

It is not an unprimeable number, because it can be changed into a prime (999431) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 55516 + ... + 55533.

2⁹⁹⁹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

999441 is a deficient number, since it is larger than the sum of its proper divisors (444209).

999441 is a wasteful number, since it uses less digits than its factorization.

999441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111055 (or 111052 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 999441 is about 999.7204609290. The cubic root of 999441 is about 99.9813631936.

The spelling of 999441 in words is "nine hundred ninety-nine thousand, four hundred forty-one".