10404221 has 16 divisors (see below), whose sum is σ = 11427840. Its totient is φ = 9434880.

The previous prime is 10404217. The next prime is 10404227. The reversal of 10404221 is 12240401.

It is a cyclic number.

It is not a de Polignac number, because 10404221 - 2² = 10404217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10404196 and 10404205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10404227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81860 + ... + 81986.

It is an arithmetic number, because the mean of its divisors is an integer number (714240).

Almost surely, 2^10404221 is an apocalyptic number.

It is an amenable number.

10404221 is a deficient number, since it is larger than the sum of its proper divisors (1023619).

10404221 is a wasteful number, since it uses less digits than its factorization.

10404221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 10404221 is about 3225.5574711978. The cubic root of 10404221 is about 218.3081031908.

Adding to 10404221 its reverse (12240401), we get a palindrome (22644622).

The spelling of 10404221 in words is "ten million, four hundred four thousand, two hundred twenty-one".