2259643 has 2 divisors, whose sum is σ = 2259644. Its totient is φ = 2259642.

The previous prime is 2259629. The next prime is 2259671. The reversal of 2259643 is 3469522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2259643 - 2¹³ = 2251451 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (2259143) 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, 1129821 + 1129822.

It is an arithmetic number, because the mean of its divisors is an integer number (1129822).

2^2259643 is an apocalyptic number.

2259643 is the 804-th centered heptagonal number.

2259643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2259643 is an equidigital number, since it uses as much as digits as its factorization.

2259643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 2259643 is about 1503.2108967141. The cubic root of 2259643 is about 131.2240015020.

The spelling of 2259643 in words is "two million, two hundred fifty-nine thousand, six hundred forty-three".