1143257 has 2 divisors, whose sum is σ = 1143258.
Its totient is φ = 1143256.
The previous prime is 1143239. The next prime is 1143269. The reversal of 1143257 is 7523411.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 817216 + 326041 = 904^2 + 571^2
It is a cyclic number.
It is not a de Polignac number, because 1143257 - 26 = 1143193 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1143217) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571628 + 571629.
It is an arithmetic number, because the mean of its divisors is an integer number (571629).
21143257 is an apocalyptic number.
It is an amenable number.
1143257 is a deficient number, since it is larger than the sum of its proper divisors (1).
1143257 is an equidigital number, since it uses as much as digits as its factorization.
1143257 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 840, while the sum is 23.
The square root of 1143257 is about 1069.2319673485.
The cubic root of 1143257 is about 104.5637836226.
Adding to 1143257 its reverse (7523411), we get a palindrome (8666668).
The spelling of 1143257 in words is "one million, one hundred forty-three thousand, two hundred fifty-seven".