10821641 has 2 divisors, whose sum is σ = 10821642. Its totient is φ = 10821640.

The previous prime is 10821631. The next prime is 10821647. The reversal of 10821641 is 14612801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7268416 + 3553225 = 2696^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 10821641 - 2¹⁰ = 10820617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10821647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5410820 + 5410821.

It is an arithmetic number, because the mean of its divisors is an integer number (5410821).

Almost surely, 2^10821641 is an apocalyptic number.

It is an amenable number.

10821641 is a deficient number, since it is larger than the sum of its proper divisors (1).

10821641 is an equidigital number, since it uses as much as digits as its factorization.

10821641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 10821641 is about 3289.6262705663. The cubic root of 10821641 is about 221.1894323874.

The spelling of 10821641 in words is "ten million, eight hundred twenty-one thousand, six hundred forty-one".