1001142563 has 8 divisors (see below), whose sum is σ = 1063949760. Its totient is φ = 938770560.

The previous prime is 1001142557. The next prime is 1001142673. The reversal of 1001142563 is 3652411001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001142563 - 2²⁰ = 1000093987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001142463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104048 + ... + 113261.

It is an arithmetic number, because the mean of its divisors is an integer number (132993720).

Almost surely, 2^1001142563 is an apocalyptic number.

1001142563 is a deficient number, since it is larger than the sum of its proper divisors (62807197).

1001142563 is a wasteful number, since it uses less digits than its factorization.

1001142563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217597.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1001142563 is about 31640.8369516358. The cubic root of 1001142563 is about 1000.3807093753.

Adding to 1001142563 its reverse (3652411001), we get a palindrome (4653553564).

The spelling of 1001142563 in words is "one billion, one million, one hundred forty-two thousand, five hundred sixty-three".