2543617 has 2 divisors, whose sum is σ = 2543618. Its totient is φ = 2543616.

The previous prime is 2543609. The next prime is 2543621. The reversal of 2543617 is 7163452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1324801 + 1218816 = 1151^2 + 1104^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543617 - 2³ = 2543609 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271808 + 1271809.

It is an arithmetic number, because the mean of its divisors is an integer number (1271809).

It is a Proth number, since it is equal to 621 ⋅ 2¹² + 1 and 621 < 2¹².

2^2543617 is an apocalyptic number.

It is an amenable number.

2543617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543617 is an equidigital number, since it uses as much as digits as its factorization.

2543617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 2543617 is about 1594.8720951851. The cubic root of 2543617 is about 136.5056329215.

It can be divided in two parts, 2543 and 617, that added together give a triangular number (3160 = T₇₉).

The spelling of 2543617 in words is "two million, five hundred forty-three thousand, six hundred seventeen".