10040405 has 4 divisors (see below), whose sum is σ = 12048492. Its totient is φ = 8032320.

The previous prime is 10040399. The next prime is 10040413. The reversal of 10040405 is 50404001.

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 7711729 + 2328676 = 2777^2 + 1526^2 .

It is not a de Polignac number, because 10040405 - 2¹² = 10036309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10040405.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1004036 + ... + 1004045.

It is an arithmetic number, because the mean of its divisors is an integer number (3012123).

Almost surely, 2^10040405 is an apocalyptic number.

It is an amenable number.

10040405 is a deficient number, since it is larger than the sum of its proper divisors (2008087).

10040405 is an equidigital number, since it uses as much as digits as its factorization.

10040405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008086.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 10040405 is about 3168.6598113398. The cubic root of 10040405 is about 215.7332455177.

Adding to 10040405 its reverse (50404001), we get a palindrome (60444406).

The spelling of 10040405 in words is "ten million, forty thousand, four hundred five".