104219521 has 16 divisors (see below), whose sum is σ = 122054400. Its totient is φ = 88952640.

The previous prime is 104219519. The next prime is 104219567. The reversal of 104219521 is 125912401.

It is a happy number.

It is not a de Polignac number, because 104219521 - 2¹ = 104219519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104214521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106185 + ... + 107161.

It is an arithmetic number, because the mean of its divisors is an integer number (7628400).

Almost surely, 2^104219521 is an apocalyptic number.

It is an amenable number.

104219521 is a deficient number, since it is larger than the sum of its proper divisors (17834879).

104219521 is an frugal number, since it uses more digits than its factorization.

104219521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 104219521 is about 10208.7962561705. The cubic root of 104219521 is about 470.5975815157.

The spelling of 104219521 in words is "one hundred four million, two hundred nineteen thousand, five hundred twenty-one".