143257 has 2 divisors, whose sum is σ = 143258. Its totient is φ = 143256.

The previous prime is 143249. The next prime is 143261. The reversal of 143257 is 752341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76176 + 67081 = 276^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 143257 - 2³ = 143249 is a prime.

It is not a weakly prime, because it can be changed into another prime (143287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71628 + 71629.

It is an arithmetic number, because the mean of its divisors is an integer number (71629).

2¹⁴³²⁵⁷ is an apocalyptic number.

It is an amenable number.

143257 is a deficient number, since it is larger than the sum of its proper divisors (1).

143257 is an equidigital number, since it uses as much as digits as its factorization.

143257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 22.

The square root of 143257 is about 378.4930646657. The cubic root of 143257 is about 52.3245237401.

Adding to 143257 its reverse (752341), we get a palindrome (895598).

It can be divided in two parts, 143 and 257, that added together give a square (400 = 20²).

The spelling of 143257 in words is "one hundred forty-three thousand, two hundred fifty-seven".