2761216 has 20 divisors (see below), whose sum is σ = 5518062. Its totient is φ = 1380352.

The previous prime is 2761207. The next prime is 2761217. The reversal of 2761216 is 6121672.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 1081600 = 1296^2 + 1040^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2761217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2185 + ... + 3208.

2^2761216 is an apocalyptic number.

It is an amenable number.

2761216 is a deficient number, since it is larger than the sum of its proper divisors (2756846).

2761216 is an frugal number, since it uses more digits than its factorization.

2761216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411 (or 5395 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 2761216 is about 1661.6907052758. The cubic root of 2761216 is about 140.2921789163.

Adding to 2761216 its reverse (6121672), we get a palindrome (8882888).

The spelling of 2761216 in words is "two million, seven hundred sixty-one thousand, two hundred sixteen".