1025090557 has 2 divisors, whose sum is σ = 1025090558. Its totient is φ = 1025090556.

The previous prime is 1025090509. The next prime is 1025090597. The reversal of 1025090557 is 7550905201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 686125636 + 338964921 = 26194^2 + 18411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025090557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025090597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512545278 + 512545279.

It is an arithmetic number, because the mean of its divisors is an integer number (512545279).

Almost surely, 2^1025090557 is an apocalyptic number.

It is an amenable number.

1025090557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025090557 is an equidigital number, since it uses as much as digits as its factorization.

1025090557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 1025090557 is about 32017.0354186642. The cubic root of 1025090557 is about 1008.2945295603.

Adding to 1025090557 its reverse (7550905201), we get a palindrome (8575995758).

The spelling of 1025090557 in words is "one billion, twenty-five million, ninety thousand, five hundred fifty-seven".