2773121 has 12 divisors (see below), whose sum is σ = 3063420. Its totient is φ = 2508480.

The previous prime is 2773097. The next prime is 2773123. The reversal of 2773121 is 1213772.

2773121 = 314² + 315² + ... + 339².

It can be written as a sum of positive squares in 6 ways, for example, as 1849600 + 923521 = 1360^2 + 961^2 .

It is not a de Polignac number, because 2773121 - 2¹⁰ = 2772097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2773123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10175 + ... + 10443.

It is an arithmetic number, because the mean of its divisors is an integer number (255285).

2^2773121 is an apocalyptic number.

It is an amenable number.

2773121 is a deficient number, since it is larger than the sum of its proper divisors (290299).

2773121 is a wasteful number, since it uses less digits than its factorization.

2773121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 343 counting only the distinct ones).

The product of its digits is 588, while the sum is 23.

The square root of 2773121 is about 1665.2690473314. The cubic root of 2773121 is about 140.4935133761.

Adding to 2773121 its reverse (1213772), we get a palindrome (3986893).

It can be divided in two parts, 2773 and 121, that multiplied together give a palindrome (335533).

The spelling of 2773121 in words is "two million, seven hundred seventy-three thousand, one hundred twenty-one".