12798521 has 4 divisors (see below), whose sum is σ = 12811344. Its totient is φ = 12785700.

The previous prime is 12798509. The next prime is 12798547. The reversal of 12798521 is 12589721.

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 a de Polignac number, because none of the positive numbers 2^k-12798521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12798551) 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 3 ways as a sum of consecutive naturals, for example, 4775 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (3202836).

Almost surely, 2^12798521 is an apocalyptic number.

It is an amenable number.

12798521 is a deficient number, since it is larger than the sum of its proper divisors (12823).

12798521 is a wasteful number, since it uses less digits than its factorization.

12798521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822.

The product of its digits is 10080, while the sum is 35.

The square root of 12798521 is about 3577.5020614949. The cubic root of 12798521 is about 233.9124090803.

The spelling of 12798521 in words is "twelve million, seven hundred ninety-eight thousand, five hundred twenty-one".