65405 has 8 divisors (see below), whose sum is σ = 79872. Its totient is φ = 51408.

The previous prime is 65393. The next prime is 65407. The reversal of 65405 is 50456.

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 65405 - 2¹⁰ = 64381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 6.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65405.

It is not an unprimeable number, because it can be changed into a prime (65407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452 + ... + 578.

It is an arithmetic number, because the mean of its divisors is an integer number (9984).

2⁶⁵⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

65405 is a deficient number, since it is larger than the sum of its proper divisors (14467).

65405 is a wasteful number, since it uses less digits than its factorization.

65405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 65405 is about 255.7440126376. The cubic root of 65405 is about 40.2905921265.

The spelling of 65405 in words is "sixty-five thousand, four hundred five".