1321175057 has 2 divisors, whose sum is σ = 1321175058. Its totient is φ = 1321175056.

The previous prime is 1321174999. The next prime is 1321175059. The reversal of 1321175057 is 7505711231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1270138321 + 51036736 = 35639^2 + 7144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321175057 - 2⁸ = 1321174801 is a prime.

Together with 1321175059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1321175059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660587528 + 660587529.

It is an arithmetic number, because the mean of its divisors is an integer number (660587529).

Almost surely, 2^1321175057 is an apocalyptic number.

It is an amenable number.

1321175057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321175057 is an equidigital number, since it uses as much as digits as its factorization.

1321175057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 1321175057 is about 36347.9718416310. The cubic root of 1321175057 is about 1097.2867169944.

Adding to 1321175057 its reverse (7505711231), we get a palindrome (8826886288).

The spelling of 1321175057 in words is "one billion, three hundred twenty-one million, one hundred seventy-five thousand, fifty-seven".