2120786 has 4 divisors (see below), whose sum is σ = 3181182. Its totient is φ = 1060392.

The previous prime is 2120779. The next prime is 2120819. The reversal of 2120786 is 6870212.

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

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 32761 = 1445^2 + 181^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530195 + ... + 530198.

2^2120786 is an apocalyptic number.

2120786 is a deficient number, since it is larger than the sum of its proper divisors (1060396).

2120786 is a wasteful number, since it uses less digits than its factorization.

2120786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060395.

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

The square root of 2120786 is about 1456.2918663510. The cubic root of 2120786 is about 128.4790399178.

Adding to 2120786 its reverse (6870212), we get a palindrome (8990998).

The spelling of 2120786 in words is "two million, one hundred twenty thousand, seven hundred eighty-six".