12821417 has 16 divisors (see below), whose sum is σ = 15633792. Its totient is φ = 10264320.

The previous prime is 12821411. The next prime is 12821423. The reversal of 12821417 is 71412821.

12821417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12821411) and next prime (12821423).

It is a cyclic number.

It is not a de Polignac number, because 12821417 - 2⁴ = 12821401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12821411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19067 + ... + 19727.

It is an arithmetic number, because the mean of its divisors is an integer number (977112).

Almost surely, 2^12821417 is an apocalyptic number.

12821417 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12821417 is a deficient number, since it is larger than the sum of its proper divisors (2812375).

12821417 is a wasteful number, since it uses less digits than its factorization.

12821417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848.

The product of its digits is 896, while the sum is 26.

The square root of 12821417 is about 3580.7006297651. The cubic root of 12821417 is about 234.0518123757.

The spelling of 12821417 in words is "twelve million, eight hundred twenty-one thousand, four hundred seventeen".