43298561 has 2 divisors, whose sum is σ = 43298562. Its totient is φ = 43298560.

The previous prime is 43298539. The next prime is 43298573. The reversal of 43298561 is 16589234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37442161 + 5856400 = 6119^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 43298561 - 2¹⁰ = 43297537 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43298161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21649280 + 21649281.

It is an arithmetic number, because the mean of its divisors is an integer number (21649281).

Almost surely, 2^43298561 is an apocalyptic number.

It is an amenable number.

43298561 is a deficient number, since it is larger than the sum of its proper divisors (1).

43298561 is an equidigital number, since it uses as much as digits as its factorization.

43298561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 43298561 is about 6580.1642076775. The cubic root of 43298561 is about 351.1487723056.

The spelling of 43298561 in words is "forty-three million, two hundred ninety-eight thousand, five hundred sixty-one".