2742217 has 2 divisors, whose sum is σ = 2742218. Its totient is φ = 2742216.

The previous prime is 2742209. The next prime is 2742227. The reversal of 2742217 is 7122472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 881721 = 1364^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2742217 - 2³ = 2742209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2742191 and 2742200.

It is not a weakly prime, because it can be changed into another prime (2742227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1371108 + 1371109.

It is an arithmetic number, because the mean of its divisors is an integer number (1371109).

2^2742217 is an apocalyptic number.

It is an amenable number.

2742217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2742217 is an equidigital number, since it uses as much as digits as its factorization.

2742217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568, while the sum is 25.

The square root of 2742217 is about 1655.9640696585. The cubic root of 2742217 is about 139.9696703006.

Adding to 2742217 its reverse (7122472), we get a palindrome (9864689).

The spelling of 2742217 in words is "two million, seven hundred forty-two thousand, two hundred seventeen".