104169581 has 4 divisors (see below), whose sum is σ = 104624700. Its totient is φ = 103714464.

The previous prime is 104169563. The next prime is 104169589. The reversal of 104169581 is 185961401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 185961401 = 127 ⋅1464263.

It can be written as a sum of positive squares in 2 ways, for example, as 96138025 + 8031556 = 9805^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 104169581 - 2¹⁴ = 104153197 is a prime.

It is a super-2 number, since 2×104169581² = 21702603211431122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104169589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227216 + ... + 227673.

It is an arithmetic number, because the mean of its divisors is an integer number (26156175).

Almost surely, 2^104169581 is an apocalyptic number.

It is an amenable number.

104169581 is a deficient number, since it is larger than the sum of its proper divisors (455119).

104169581 is an equidigital number, since it uses as much as digits as its factorization.

104169581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455118.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 104169581 is about 10206.3500331901. The cubic root of 104169581 is about 470.5224023879.

The spelling of 104169581 in words is "one hundred four million, one hundred sixty-nine thousand, five hundred eighty-one".