104543521 has 8 divisors (see below), whose sum is σ = 108541800. Its totient is φ = 100571520.

The previous prime is 104543497. The next prime is 104543531. The reversal of 104543521 is 125345401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37957921 + 66585600 = 6161^2 + 8160^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 104543521 - 2⁷ = 104543393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104543531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1735 + ... + 14563.

It is an arithmetic number, because the mean of its divisors is an integer number (13567725).

Almost surely, 2^104543521 is an apocalyptic number.

It is an amenable number.

104543521 is a deficient number, since it is larger than the sum of its proper divisors (3998279).

104543521 is a wasteful number, since it uses less digits than its factorization.

104543521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13139.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 104543521 is about 10224.6526102357. The cubic root of 104543521 is about 471.0847451577.

Adding to 104543521 its reverse (125345401), we get a palindrome (229888922).

The spelling of 104543521 in words is "one hundred four million, five hundred forty-three thousand, five hundred twenty-one".