2772121 has 8 divisors (see below), whose sum is σ = 3155904. Its totient is φ = 2410320.

The previous prime is 2772101. The next prime is 2772127. The reversal of 2772121 is 1212772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2772121 - 2⁵ = 2772089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2772092 and 2772101.

It is not an unprimeable number, because it can be changed into a prime (2772127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5226 + ... + 5731.

It is an arithmetic number, because the mean of its divisors is an integer number (394488).

2^2772121 is an apocalyptic number.

It is an amenable number.

2772121 is a deficient number, since it is larger than the sum of its proper divisors (383783).

2772121 is a wasteful number, since it uses less digits than its factorization.

2772121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10991.

The product of its digits is 392, while the sum is 22.

The square root of 2772121 is about 1664.9687684759. The cubic root of 2772121 is about 140.4766238132.

Adding to 2772121 its reverse (1212772), we get a palindrome (3984893).

The spelling of 2772121 in words is "two million, seven hundred seventy-two thousand, one hundred twenty-one".