10404821 has 4 divisors (see below), whose sum is σ = 11891232. Its totient is φ = 8918412.

The previous prime is 10404811. The next prime is 10404829. The reversal of 10404821 is 12840401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10404821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10404793 and 10404802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10404829) 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, 743195 + ... + 743208.

It is an arithmetic number, because the mean of its divisors is an integer number (2972808).

Almost surely, 2^10404821 is an apocalyptic number.

It is an amenable number.

10404821 is a deficient number, since it is larger than the sum of its proper divisors (1486411).

10404821 is an equidigital number, since it uses as much as digits as its factorization.

10404821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486410.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 10404821 is about 3225.6504770356. The cubic root of 10404821 is about 218.3122996397.

The spelling of 10404821 in words is "ten million, four hundred four thousand, eight hundred twenty-one".