2775121 has 4 divisors (see below), whose sum is σ = 2921200. Its totient is φ = 2629044.

The previous prime is 2775119. The next prime is 2775137. The reversal of 2775121 is 1215772.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2775121 - 2¹ = 2775119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2775161) 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, 73011 + ... + 73048.

It is an arithmetic number, because the mean of its divisors is an integer number (730300).

2^2775121 is an apocalyptic number.

It is an amenable number.

2775121 is a deficient number, since it is larger than the sum of its proper divisors (146079).

2775121 is a wasteful number, since it uses less digits than its factorization.

2775121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146078.

The product of its digits is 980, while the sum is 25.

The square root of 2775121 is about 1665.8694426635. The cubic root of 2775121 is about 140.5272803248.

It can be divided in two parts, 27751 and 21, that added together give a palindrome (27772).

The spelling of 2775121 in words is "two million, seven hundred seventy-five thousand, one hundred twenty-one".