102340243 has 4 divisors (see below), whose sum is σ = 102720960. Its totient is φ = 101959528.

The previous prime is 102340237. The next prime is 102340247. The reversal of 102340243 is 342043201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342043201 = 277 ⋅1234813.

It is a cyclic number.

It is not a de Polignac number, because 102340243 - 2⁵ = 102340211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102340243.

It is not an unprimeable number, because it can be changed into a prime (102340247) 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 in 3 ways as a sum of consecutive naturals, for example, 189955 + ... + 190492.

It is an arithmetic number, because the mean of its divisors is an integer number (25680240).

Almost surely, 2^102340243 is an apocalyptic number.

102340243 is a deficient number, since it is larger than the sum of its proper divisors (380717).

102340243 is an equidigital number, since it uses as much as digits as its factorization.

102340243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380716.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 102340243 is about 10116.3354531174. The cubic root of 102340243 is about 467.7518149225.

Adding to 102340243 its reverse (342043201), we get a palindrome (444383444).

The spelling of 102340243 in words is "one hundred two million, three hundred forty thousand, two hundred forty-three".