1021143457 has 2 divisors, whose sum is σ = 1021143458. Its totient is φ = 1021143456.

The previous prime is 1021143419. The next prime is 1021143463. The reversal of 1021143457 is 7543411201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 930494016 + 90649441 = 30504^2 + 9521^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021143457 - 2¹¹ = 1021141409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021143257) 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, 510571728 + 510571729.

It is an arithmetic number, because the mean of its divisors is an integer number (510571729).

Almost surely, 2^1021143457 is an apocalyptic number.

It is an amenable number.

1021143457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021143457 is an equidigital number, since it uses as much as digits as its factorization.

1021143457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1021143457 is about 31955.3353448215. The cubic root of 1021143457 is about 1006.9987226111.

Adding to 1021143457 its reverse (7543411201), we get a palindrome (8564554658).

The spelling of 1021143457 in words is "one billion, twenty-one million, one hundred forty-three thousand, four hundred fifty-seven".