10404421 has 2 divisors, whose sum is σ = 10404422. Its totient is φ = 10404420.

The previous prime is 10404403. The next prime is 10404431. The reversal of 10404421 is 12440401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7022500 + 3381921 = 2650^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 10404421 - 2¹³ = 10396229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10404395 and 10404404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10404431) by changing a digit.

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 as a sum of consecutive naturals, namely, 5202210 + 5202211.

It is an arithmetic number, because the mean of its divisors is an integer number (5202211).

Almost surely, 2^10404421 is an apocalyptic number.

It is an amenable number.

10404421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10404421 is an equidigital number, since it uses as much as digits as its factorization.

10404421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 10404421 is about 3225.5884734417. The cubic root of 10404421 is about 218.3095020250.

Adding to 10404421 its reverse (12440401), we get a palindrome (22844822).

The spelling of 10404421 in words is "ten million, four hundred four thousand, four hundred twenty-one".