104306521 has 4 divisors (see below), whose sum is σ = 113788944. Its totient is φ = 94824100.

The previous prime is 104306507. The next prime is 104306557. The reversal of 104306521 is 125603401.

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.

It is a cyclic number.

It is not a de Polignac number, because 104306521 - 2⁷ = 104306393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104306492 and 104306501.

It is not an unprimeable number, because it can be changed into a prime (104306581) 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, 4741195 + ... + 4741216.

It is an arithmetic number, because the mean of its divisors is an integer number (28447236).

Almost surely, 2^104306521 is an apocalyptic number.

104306521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

104306521 is a deficient number, since it is larger than the sum of its proper divisors (9482423).

104306521 is an equidigital number, since it uses as much as digits as its factorization.

104306521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9482422.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 104306521 is about 10213.0563985518. The cubic root of 104306521 is about 470.7284930186.

Adding to 104306521 its reverse (125603401), we get a palindrome (229909922).

The spelling of 104306521 in words is "one hundred four million, three hundred six thousand, five hundred twenty-one".