2747321 has 2 divisors, whose sum is σ = 2747322. Its totient is φ = 2747320.

The previous prime is 2747309. The next prime is 2747323. The reversal of 2747321 is 1237472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 436921 = 1520^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2747321 - 2¹⁰ = 2746297 is a prime.

Together with 2747323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2747323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1373660 + 1373661.

It is an arithmetic number, because the mean of its divisors is an integer number (1373661).

2^2747321 is an apocalyptic number.

It is an amenable number.

2747321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2747321 is an equidigital number, since it uses as much as digits as its factorization.

2747321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 26.

The square root of 2747321 is about 1657.5044494661. The cubic root of 2747321 is about 140.0564568218.

The spelling of 2747321 in words is "two million, seven hundred forty-seven thousand, three hundred twenty-one".