1564242041 has 2 divisors, whose sum is σ = 1564242042. Its totient is φ = 1564242040.

The previous prime is 1564242037. The next prime is 1564242061. The reversal of 1564242041 is 1402424651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1404750400 + 159491641 = 37480^2 + 12629^2 .

It is an emirp because it is prime and its reverse (1402424651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1564242041 - 2² = 1564242037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1564241995 and 1564242013.

It is not a weakly prime, because it can be changed into another prime (1564242061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782121020 + 782121021.

It is an arithmetic number, because the mean of its divisors is an integer number (782121021).

Almost surely, 2^1564242041 is an apocalyptic number.

It is an amenable number.

1564242041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564242041 is an equidigital number, since it uses as much as digits as its factorization.

1564242041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 1564242041 is about 39550.4998830609. The cubic root of 1564242041 is about 1160.8282929328.

Adding to 1564242041 its reverse (1402424651), we get a palindrome (2966666692).

The spelling of 1564242041 in words is "one billion, five hundred sixty-four million, two hundred forty-two thousand, forty-one".