104285521 has 2 divisors, whose sum is σ = 104285522. Its totient is φ = 104285520.

The previous prime is 104285513. The next prime is 104285557. The reversal of 104285521 is 125582401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53363025 + 50922496 = 7305^2 + 7136^2 .

It is a cyclic number.

It is not a de Polignac number, because 104285521 - 2³ = 104285513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 104285521.

It is not a weakly prime, because it can be changed into another prime (104285501) 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, 52142760 + 52142761.

It is an arithmetic number, because the mean of its divisors is an integer number (52142761).

Almost surely, 2^104285521 is an apocalyptic number.

It is an amenable number.

104285521 is a deficient number, since it is larger than the sum of its proper divisors (1).

104285521 is an equidigital number, since it uses as much as digits as its factorization.

104285521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 104285521 is about 10212.0282510381. The cubic root of 104285521 is about 470.6969003572.

The spelling of 104285521 in words is "one hundred four million, two hundred eighty-five thousand, five hundred twenty-one".