1563145442 has 4 divisors (see below), whose sum is σ = 2344718166. Its totient is φ = 781572720.

The previous prime is 1563145403. The next prime is 1563145471. The reversal of 1563145442 is 2445413651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1535150761 + 27994681 = 39181^2 + 5291^2 .

It is an unprimeable number.

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, 390786359 + ... + 390786362.

Almost surely, 2^1563145442 is an apocalyptic number.

1563145442 is a deficient number, since it is larger than the sum of its proper divisors (781572724).

1563145442 is an equidigital number, since it uses as much as digits as its factorization.

1563145442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781572723.

The product of its digits is 57600, while the sum is 35.

The square root of 1563145442 is about 39536.6341764192. The cubic root of 1563145442 is about 1160.5569664810.

Subtracting 1563145442 from its reverse (2445413651), we obtain a square (882268209 = 29703²).

The spelling of 1563145442 in words is "one billion, five hundred sixty-three million, one hundred forty-five thousand, four hundred forty-two".