104090521 has 2 divisors, whose sum is σ = 104090522. Its totient is φ = 104090520.

The previous prime is 104090501. The next prime is 104090533. The reversal of 104090521 is 125090401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 15523600 = 9411^2 + 3940^2 .

It is an emirp because it is prime and its reverse (125090401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104090521 - 2¹⁵ = 104057753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 104090492 and 104090501.

It is not a weakly prime, because it can be changed into another prime (104090501) 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, 52045260 + 52045261.

It is an arithmetic number, because the mean of its divisors is an integer number (52045261).

Almost surely, 2^104090521 is an apocalyptic number.

It is an amenable number.

104090521 is a deficient number, since it is larger than the sum of its proper divisors (1).

104090521 is an equidigital number, since it uses as much as digits as its factorization.

104090521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 104090521 is about 10202.4762190362. The cubic root of 104090521 is about 470.4033371878.

The spelling of 104090521 in words is "one hundred four million, ninety thousand, five hundred twenty-one".