10260821 has 2 divisors, whose sum is σ = 10260822. Its totient is φ = 10260820.

The previous prime is 10260799. The next prime is 10260827. The reversal of 10260821 is 12806201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5354596 + 4906225 = 2314^2 + 2215^2 .

It is an emirp because it is prime and its reverse (12806201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10260821 - 2²² = 6066517 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10260793 and 10260802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10260827) 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, 5130410 + 5130411.

It is an arithmetic number, because the mean of its divisors is an integer number (5130411).

Almost surely, 2^10260821 is an apocalyptic number.

It is an amenable number.

10260821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10260821 is an equidigital number, since it uses as much as digits as its factorization.

10260821 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 20.

The square root of 10260821 is about 3203.2516292043. The cubic root of 10260821 is about 217.3004890857.

It can be divided in two parts, 10260 and 821, that multiplied together give a triangular number (8423460 = T₄₁₀₄).

The spelling of 10260821 in words is "ten million, two hundred sixty thousand, eight hundred twenty-one".