64605 has 16 divisors (see below), whose sum is σ = 106560. Its totient is φ = 33408.

The previous prime is 64601. The next prime is 64609. The reversal of 64605 is 50646.

It is an interprime number because it is at equal distance from previous prime (64601) and next prime (64609).

It is not a de Polignac number, because 64605 - 2² = 64601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849 + ... + 921.

It is an arithmetic number, because the mean of its divisors is an integer number (6660).

2⁶⁴⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

64605 is a deficient number, since it is larger than the sum of its proper divisors (41955).

64605 is a wasteful number, since it uses less digits than its factorization.

64605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 64605 is about 254.1751364709. The cubic root of 64605 is about 40.1256465769.

The spelling of 64605 in words is "sixty-four thousand, six hundred five".