1345143257 has 2 divisors, whose sum is σ = 1345143258. Its totient is φ = 1345143256.

The previous prime is 1345143199. The next prime is 1345143277. The reversal of 1345143257 is 7523415431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 987782041 + 357361216 = 31429^2 + 18904^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345143257 - 2⁶ = 1345143193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345143277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672571628 + 672571629.

It is an arithmetic number, because the mean of its divisors is an integer number (672571629).

Almost surely, 2^1345143257 is an apocalyptic number.

It is an amenable number.

1345143257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345143257 is an equidigital number, since it uses as much as digits as its factorization.

1345143257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 35.

The square root of 1345143257 is about 36676.1946908345. The cubic root of 1345143257 is about 1103.8824945059.

Adding to 1345143257 its reverse (7523415431), we get a palindrome (8868558688).

The spelling of 1345143257 in words is "one billion, three hundred forty-five million, one hundred forty-three thousand, two hundred fifty-seven".