104819521 has 4 divisors (see below), whose sum is σ = 105190192. Its totient is φ = 104448852.

The previous prime is 104819503. The next prime is 104819527. The reversal of 104819521 is 125918401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125918401 = 7 ⋅17988343.

It is a cyclic number.

It is not a de Polignac number, because 104819521 - 2¹⁷ = 104688449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104819527) 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, 184911 + ... + 185476.

It is an arithmetic number, because the mean of its divisors is an integer number (26297548).

Almost surely, 2^104819521 is an apocalyptic number.

It is an amenable number.

104819521 is a deficient number, since it is larger than the sum of its proper divisors (370671).

104819521 is an equidigital number, since it uses as much as digits as its factorization.

104819521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370670.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 104819521 is about 10238.1405049941. The cubic root of 104819521 is about 471.4989431133.

It can be divided in two parts, 10481 and 9521, that added together give a palindrome (20002).

The spelling of 104819521 in words is "one hundred four million, eight hundred nineteen thousand, five hundred twenty-one".