12020517 has 12 divisors (see below), whose sum is σ = 17491500. Its totient is φ = 7954368.

The previous prime is 12020509. The next prime is 12020527. The reversal of 12020517 is 71502021.

It can be written as a sum of positive squares in 2 ways, for example, as 4186116 + 7834401 = 2046^2 + 2799^2 .

It is not a de Polignac number, because 12020517 - 2³ = 12020509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12020517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3642 + ... + 6107.

It is an arithmetic number, because the mean of its divisors is an integer number (1457625).

Almost surely, 2^12020517 is an apocalyptic number.

It is an amenable number.

12020517 is a deficient number, since it is larger than the sum of its proper divisors (5470983).

12020517 is a wasteful number, since it uses less digits than its factorization.

12020517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9892 (or 9889 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 12020517 is about 3467.0617242847. The cubic root of 12020517 is about 229.0732525645.

Adding to 12020517 its reverse (71502021), we get a palindrome (83522538).

The spelling of 12020517 in words is "twelve million, twenty thousand, five hundred seventeen".