2120777 has 4 divisors (see below), whose sum is σ = 2132676. Its totient is φ = 2108880.

The previous prime is 2120771. The next prime is 2120779. The reversal of 2120777 is 7770212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15376 + 2105401 = 124^2 + 1451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5678 + ... + 6039.

It is an arithmetic number, because the mean of its divisors is an integer number (533169).

2^2120777 is an apocalyptic number.

It is an amenable number.

2120777 is a deficient number, since it is larger than the sum of its proper divisors (11899).

2120777 is a wasteful number, since it uses less digits than its factorization.

2120777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11898.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 2120777 is about 1456.2887763078. The cubic root of 2120777 is about 128.4788581750.

Adding to 2120777 its reverse (7770212), we get a palindrome (9890989).

The spelling of 2120777 in words is "two million, one hundred twenty thousand, seven hundred seventy-seven".