102143257 has 2 divisors, whose sum is σ = 102143258. Its totient is φ = 102143256.

The previous prime is 102143159. The next prime is 102143263. The reversal of 102143257 is 752341201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102090816 + 52441 = 10104^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 102143257 - 2¹⁹ = 101618969 is a prime.

It is not a weakly prime, because it can be changed into another prime (102143057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51071628 + 51071629.

It is an arithmetic number, because the mean of its divisors is an integer number (51071629).

Almost surely, 2^102143257 is an apocalyptic number.

It is an amenable number.

102143257 is a deficient number, since it is larger than the sum of its proper divisors (1).

102143257 is an equidigital number, since it uses as much as digits as its factorization.

102143257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 102143257 is about 10106.5947281960. The cubic root of 102143257 is about 467.4515103129.

Adding to 102143257 its reverse (752341201), we get a palindrome (854484458).

It can be divided in two parts, 102143 and 257, that added together give a square (102400 = 320²).

The spelling of 102143257 in words is "one hundred two million, one hundred forty-three thousand, two hundred fifty-seven".