10204561 has 2 divisors, whose sum is σ = 10204562. Its totient is φ = 10204560.

The previous prime is 10204559. The next prime is 10204589. The reversal of 10204561 is 16540201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8300161 + 1904400 = 2881^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 10204561 - 2¹ = 10204559 is a prime.

Together with 10204559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10204541) 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, 5102280 + 5102281.

It is an arithmetic number, because the mean of its divisors is an integer number (5102281).

Almost surely, 2^10204561 is an apocalyptic number.

It is an amenable number.

10204561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10204561 is an equidigital number, since it uses as much as digits as its factorization.

10204561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 10204561 is about 3194.4578569767. The cubic root of 10204561 is about 216.9026087207.

Adding to 10204561 its reverse (16540201), we get a palindrome (26744762).

The spelling of 10204561 in words is "ten million, two hundred four thousand, five hundred sixty-one".