2712121 has 8 divisors (see below), whose sum is σ = 2783304. Its totient is φ = 2641920.

The previous prime is 2712119. The next prime is 2712131. The reversal of 2712121 is 1212172.

2712121 = 1164² + 1165².

It can be written as a sum of positive squares in 4 ways, for example, as 1022121 + 1690000 = 1011^2 + 1300^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2712121 - 2¹ = 2712119 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2712095 and 2712104.

It is not an unprimeable number, because it can be changed into a prime (2712131) 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, 10425 + ... + 10681.

It is an arithmetic number, because the mean of its divisors is an integer number (347913).

2^2712121 is an apocalyptic number.

2712121 is the 1165-th centered square number.

It is an amenable number.

2712121 is a deficient number, since it is larger than the sum of its proper divisors (71183).

2712121 is a wasteful number, since it uses less digits than its factorization.

2712121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 56, while the sum is 16.

The square root of 2712121 is about 1646.8518451883. The cubic root of 2712121 is about 139.4557269268.

Adding to 2712121 its reverse (1212172), we get a palindrome (3924293).

The spelling of 2712121 in words is "two million, seven hundred twelve thousand, one hundred twenty-one".