1563240142 has 4 divisors (see below), whose sum is σ = 2344860216. Its totient is φ = 781620070.

The previous prime is 1563240101. The next prime is 1563240199. The reversal of 1563240142 is 2410423651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2410423651 = 34919 ⋅69029.

It is a self number, because there is not a number n which added to its sum of digits gives 1563240142.

It is a congruent number.

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, 390810034 + ... + 390810037.

It is an arithmetic number, because the mean of its divisors is an integer number (586215054).

Almost surely, 2^1563240142 is an apocalyptic number.

1563240142 is a deficient number, since it is larger than the sum of its proper divisors (781620074).

1563240142 is an equidigital number, since it uses as much as digits as its factorization.

1563240142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781620073.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1563240142 is about 39537.8317817252. The cubic root of 1563240142 is about 1160.5804026720.

Adding to 1563240142 its reverse (2410423651), we get a palindrome (3973663793).

The spelling of 1563240142 in words is "one billion, five hundred sixty-three million, two hundred forty thousand, one hundred forty-two".