1565113427 has 2 divisors, whose sum is σ = 1565113428. Its totient is φ = 1565113426.

The previous prime is 1565113423. The next prime is 1565113447. The reversal of 1565113427 is 7243115651.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7243115651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1565113427 - 2² = 1565113423 is a prime.

It is not a weakly prime, because it can be changed into another prime (1565113423) 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, 782556713 + 782556714.

It is an arithmetic number, because the mean of its divisors is an integer number (782556714).

Almost surely, 2^1565113427 is an apocalyptic number.

1565113427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1565113427 is an equidigital number, since it uses as much as digits as its factorization.

1565113427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 1565113427 is about 39561.5144679776. The cubic root of 1565113427 is about 1161.0438055634.

The spelling of 1565113427 in words is "one billion, five hundred sixty-five million, one hundred thirteen thousand, four hundred twenty-seven".