102143249 has 8 divisors (see below), whose sum is σ = 113793960. Its totient is φ = 91034496.

The previous prime is 102143159. The next prime is 102143257. The reversal of 102143249 is 942341201.

It can be written as a sum of positive squares in 4 ways, for example, as 1000000 + 101143249 = 1000^2 + 10057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102143249 - 2¹² = 102139153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102143269) 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 in 7 ways as a sum of consecutive naturals, for example, 135092 + ... + 135845.

It is an arithmetic number, because the mean of its divisors is an integer number (14224245).

Almost surely, 2^102143249 is an apocalyptic number.

It is an amenable number.

102143249 is a deficient number, since it is larger than the sum of its proper divisors (11650711).

102143249 is a wasteful number, since it uses less digits than its factorization.

102143249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270979.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 102143249 is about 10106.5943324149. The cubic root of 102143249 is about 467.4514981091.

The spelling of 102143249 in words is "one hundred two million, one hundred forty-three thousand, two hundred forty-nine".