104012521 has 4 divisors (see below), whose sum is σ = 104351632. Its totient is φ = 103673412.

The previous prime is 104012507. The next prime is 104012537. The reversal of 104012521 is 125210401.

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 104012521 - 2⁷ = 104012393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104012495 and 104012504.

It is not an unprimeable number, because it can be changed into a prime (104012501) 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, 169095 + ... + 169708.

It is an arithmetic number, because the mean of its divisors is an integer number (26087908).

Almost surely, 2^104012521 is an apocalyptic number.

It is an amenable number.

104012521 is a deficient number, since it is larger than the sum of its proper divisors (339111).

104012521 is an equidigital number, since it uses as much as digits as its factorization.

104012521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339110.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 104012521 is about 10198.6529012414. The cubic root of 104012521 is about 470.2858092622.

Adding to 104012521 its reverse (125210401), we get a palindrome (229222922).

The spelling of 104012521 in words is "one hundred four million, twelve thousand, five hundred twenty-one".