2120517 has 24 divisors (see below), whose sum is σ = 3546816. Its totient is φ = 1195776.

The previous prime is 2120513. The next prime is 2120537. The reversal of 2120517 is 7150212.

It is not a de Polignac number, because 2120517 - 2² = 2120513 is a prime.

2120517 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5938 + ... + 6284.

It is an arithmetic number, because the mean of its divisors is an integer number (147784).

2^2120517 is an apocalyptic number.

It is an amenable number.

2120517 is a deficient number, since it is larger than the sum of its proper divisors (1426299).

2120517 is a wasteful number, since it uses less digits than its factorization.

2120517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 454 counting only the distinct ones).

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

The square root of 2120517 is about 1456.1995055623. The cubic root of 2120517 is about 128.4736076044.

Adding to 2120517 its reverse (7150212), we get a palindrome (9270729).

The spelling of 2120517 in words is "two million, one hundred twenty thousand, five hundred seventeen".