30405 has 8 divisors (see below), whose sum is σ = 48672. Its totient is φ = 16208.

The previous prime is 30403. The next prime is 30427. The reversal of 30405 is 50403.

30405 is nontrivially palindromic in base 14.

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 30405 - 2¹ = 30403 is a prime.

30405 is a modest number, since divided by 405 gives 30 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30403) 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, 999 + ... + 1028.

It is an arithmetic number, because the mean of its divisors is an integer number (6084).

2³⁰⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

30405 is a deficient number, since it is larger than the sum of its proper divisors (18267).

30405 is a wasteful number, since it uses less digits than its factorization.

30405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035.

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 30405 is about 174.3702956355. The cubic root of 30405 is about 31.2115259848.

Adding to 30405 its reverse (50403), we get a palindrome (80808).

It can be divided in two parts, 30 and 405, that added together give a triangular number (435 = T₂₉).

The spelling of 30405 in words is "thirty thousand, four hundred five".