264003 has 4 divisors (see below), whose sum is σ = 352008. Its totient is φ = 176000.

The previous prime is 263983. The next prime is 264007. The reversal of 264003 is 300462.

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 264003 - 2⁹ = 263491 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (264007) 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 3 ways as a sum of consecutive naturals, for example, 43998 + ... + 44003.

It is an arithmetic number, because the mean of its divisors is an integer number (88002).

2²⁶⁴⁰⁰³ is an apocalyptic number.

264003 is a deficient number, since it is larger than the sum of its proper divisors (88005).

264003 is an equidigital number, since it uses as much as digits as its factorization.

264003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88004.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 264003 is about 513.8122225094. The cubic root of 264003 is about 64.1509295940.

Adding to 264003 its reverse (300462), we get a palindrome (564465).

The spelling of 264003 in words is "two hundred sixty-four thousand, three".