2747021 has 2 divisors, whose sum is σ = 2747022. Its totient is φ = 2747020.

The previous prime is 2746999. The next prime is 2747023. The reversal of 2747021 is 1207472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 978121 = 1330^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2747021 - 2⁶ = 2746957 is a prime.

It is a super-2 number, since 2×2747021² = 15092248748882, which contains 22 as substring.

Together with 2747023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2747023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1373510 + 1373511.

It is an arithmetic number, because the mean of its divisors is an integer number (1373511).

2^2747021 is an apocalyptic number.

It is an amenable number.

2747021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2747021 is an equidigital number, since it uses as much as digits as its factorization.

2747021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 2747021 is about 1657.4139495008. The cubic root of 2747021 is about 140.0513587079.

The spelling of 2747021 in words is "two million, seven hundred forty-seven thousand, twenty-one".