10001405 has 4 divisors (see below), whose sum is σ = 12001692. Its totient is φ = 8001120.

The previous prime is 10001401. The next prime is 10001419. The reversal of 10001405 is 50410001.

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 1643524 + 8357881 = 1282^2 + 2891^2 .

It is not a de Polignac number, because 10001405 - 2² = 10001401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000136 + ... + 1000145.

It is an arithmetic number, because the mean of its divisors is an integer number (3000423).

Almost surely, 2^10001405 is an apocalyptic number.

It is an amenable number.

10001405 is a deficient number, since it is larger than the sum of its proper divisors (2000287).

10001405 is an equidigital number, since it uses as much as digits as its factorization.

10001405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000286.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 10001405 is about 3162.4998023715. The cubic root of 10001405 is about 215.4535584665.

Adding to 10001405 its reverse (50410001), we get a palindrome (60411406).

The spelling of 10001405 in words is "ten million, one thousand, four hundred five".