12820517 has 8 divisors (see below), whose sum is σ = 13096800. Its totient is φ = 12546864.

The previous prime is 12820487. The next prime is 12820529. The reversal of 12820517 is 71502821.

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 12820517 - 2¹² = 12816421 is a prime.

It is a super-2 number, since 2×12820517² = 328731312294578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11459 + ... + 12527.

It is an arithmetic number, because the mean of its divisors is an integer number (1637100).

Almost surely, 2^12820517 is an apocalyptic number.

It is an amenable number.

12820517 is a deficient number, since it is larger than the sum of its proper divisors (276283).

12820517 is a wasteful number, since it uses less digits than its factorization.

12820517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12820517 is about 3580.5749538307. The cubic root of 12820517 is about 234.0463358213.

The spelling of 12820517 in words is "twelve million, eight hundred twenty thousand, five hundred seventeen".