12536821 has 8 divisors (see below), whose sum is σ = 14046624. Its totient is φ = 11088720.

The previous prime is 12536809. The next prime is 12536861. The reversal of 12536821 is 12863521.

It is the 1446-th star number.

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 12536821 - 2¹⁵ = 12504053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12536821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12536861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14995 + ... + 15808.

It is an arithmetic number, because the mean of its divisors is an integer number (1755828).

Almost surely, 2^12536821 is an apocalyptic number.

12536821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12536821 is a deficient number, since it is larger than the sum of its proper divisors (1509803).

12536821 is a wasteful number, since it uses less digits than its factorization.

12536821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30851.

The product of its digits is 2880, while the sum is 28.

The square root of 12536821 is about 3540.7373525863. The cubic root of 12536821 is about 232.3070955515.

The spelling of 12536821 in words is "twelve million, five hundred thirty-six thousand, eight hundred twenty-one".