1001142557 has 2 divisors, whose sum is σ = 1001142558. Its totient is φ = 1001142556.

The previous prime is 1001142521. The next prime is 1001142673. The reversal of 1001142557 is 7552411001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699390916 + 301751641 = 26446^2 + 17371^2 .

It is an emirp because it is prime and its reverse (7552411001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001142557 - 2⁸ = 1001142301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001142757) 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, 500571278 + 500571279.

It is an arithmetic number, because the mean of its divisors is an integer number (500571279).

Almost surely, 2^1001142557 is an apocalyptic number.

It is an amenable number.

1001142557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001142557 is an equidigital number, since it uses as much as digits as its factorization.

1001142557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 1001142557 is about 31640.8368568216. The cubic root of 1001142557 is about 1000.3807073768.

Adding to 1001142557 its reverse (7552411001), we get a palindrome (8553553558).

The spelling of 1001142557 in words is "one billion, one million, one hundred forty-two thousand, five hundred fifty-seven".