10430821 has 2 divisors, whose sum is σ = 10430822. Its totient is φ = 10430820.

The previous prime is 10430813. The next prime is 10430839. The reversal of 10430821 is 12803401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7918596 + 2512225 = 2814^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 10430821 - 2³ = 10430813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10430801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5215410 + 5215411.

It is an arithmetic number, because the mean of its divisors is an integer number (5215411).

Almost surely, 2^10430821 is an apocalyptic number.

It is an amenable number.

10430821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10430821 is an equidigital number, since it uses as much as digits as its factorization.

10430821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 10430821 is about 3229.6781573401. The cubic root of 10430821 is about 218.4939910061.

It can be divided in two parts, 104308 and 21, that added together give a square (104329 = 323²).

The spelling of 10430821 in words is "ten million, four hundred thirty thousand, eight hundred twenty-one".