264405 has 8 divisors (see below), whose sum is σ = 423072. Its totient is φ = 141008.

The previous prime is 264403. The next prime is 264437. The reversal of 264405 is 504462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264405 - 2¹ = 264403 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264403) 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 7 ways as a sum of consecutive naturals, for example, 8799 + ... + 8828.

It is an arithmetic number, because the mean of its divisors is an integer number (52884).

2²⁶⁴⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

264405 is a deficient number, since it is larger than the sum of its proper divisors (158667).

264405 is a wasteful number, since it uses less digits than its factorization.

264405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17635.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 264405 is about 514.2032672008. The cubic root of 264405 is about 64.1834741676.

Adding to 264405 its reverse (504462), we get a palindrome (768867).

The spelling of 264405 in words is "two hundred sixty-four thousand, four hundred five".