10000405 has 4 divisors (see below), whose sum is σ = 12000492. Its totient is φ = 8000320.

The previous prime is 10000379. The next prime is 10000439. The reversal of 10000405 is 50400001.

10000405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2283121 + 7717284 = 1511^2 + 2778^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10000405 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10000391 and 10000400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000036 + ... + 1000045.

It is an arithmetic number, because the mean of its divisors is an integer number (3000123).

Almost surely, 2^10000405 is an apocalyptic number.

It is an amenable number.

10000405 is a deficient number, since it is larger than the sum of its proper divisors (2000087).

10000405 is an equidigital number, since it uses as much as digits as its factorization.

10000405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000086.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 10000405 is about 3162.3416956426. The cubic root of 10000405 is about 215.4463774508.

Adding to 10000405 its reverse (50400001), we get a palindrome (60400406).

The spelling of 10000405 in words is "ten million, four hundred five", and thus it is an aban number.