2120687 has 4 divisors (see below), whose sum is σ = 2165856. Its totient is φ = 2075520.

The previous prime is 2120653. The next prime is 2120693. The reversal of 2120687 is 7860212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2120687 - 2¹² = 2116591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22514 + ... + 22607.

It is an arithmetic number, because the mean of its divisors is an integer number (541464).

2^2120687 is an apocalyptic number.

2120687 is a deficient number, since it is larger than the sum of its proper divisors (45169).

2120687 is an equidigital number, since it uses as much as digits as its factorization.

2120687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45168.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2120687 is about 1456.2578755152. The cubic root of 2120687 is about 128.4770407183.

Adding to 2120687 its reverse (7860212), we get a palindrome (9980899).

The spelling of 2120687 in words is "two million, one hundred twenty thousand, six hundred eighty-seven".