104442581 has 2 divisors, whose sum is σ = 104442582. Its totient is φ = 104442580.

The previous prime is 104442497. The next prime is 104442589. The reversal of 104442581 is 185244401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99820081 + 4622500 = 9991^2 + 2150^2 .

It is an emirp because it is prime and its reverse (185244401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104442581 - 2²² = 100248277 is a prime.

It is a super-2 number, since 2×104442581² = 21816505451883122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104442589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52221290 + 52221291.

It is an arithmetic number, because the mean of its divisors is an integer number (52221291).

Almost surely, 2^104442581 is an apocalyptic number.

It is an amenable number.

104442581 is a deficient number, since it is larger than the sum of its proper divisors (1).

104442581 is an equidigital number, since it uses as much as digits as its factorization.

104442581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 104442581 is about 10219.7153091463. The cubic root of 104442581 is about 470.9330807089.

Adding to 104442581 its reverse (185244401), we get a palindrome (289686982).

The spelling of 104442581 in words is "one hundred four million, four hundred forty-two thousand, five hundred eighty-one".