104817581 has 16 divisors (see below), whose sum is σ = 117272256. Its totient is φ = 93654000.

The previous prime is 104817569. The next prime is 104817599. The reversal of 104817581 is 185718401.

It is not a de Polignac number, because 104817581 - 2¹⁴ = 104801197 is a prime.

It is a super-2 number, since 2×104817581² = 21973450573383122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104817511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80546 + ... + 81836.

It is an arithmetic number, because the mean of its divisors is an integer number (7329516).

Almost surely, 2^104817581 is an apocalyptic number.

104817581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

104817581 is a deficient number, since it is larger than the sum of its proper divisors (12454675).

104817581 is an equidigital number, since it uses as much as digits as its factorization.

104817581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 104817581 is about 10238.0457607885. The cubic root of 104817581 is about 471.4960342608.

The spelling of 104817581 in words is "one hundred four million, eight hundred seventeen thousand, five hundred eighty-one".