102002543 has 4 divisors (see below), whose sum is σ = 102026640. Its totient is φ = 101978448.

The previous prime is 102002531. The next prime is 102002557. The reversal of 102002543 is 345200201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102002543 - 2⁶ = 102002479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 14787.

It is an arithmetic number, because the mean of its divisors is an integer number (25506660).

Almost surely, 2^102002543 is an apocalyptic number.

102002543 is a deficient number, since it is larger than the sum of its proper divisors (24097).

102002543 is an equidigital number, since it uses as much as digits as its factorization.

102002543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24096.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 102002543 is about 10099.6308348375. The cubic root of 102002543 is about 467.2367557222.

Adding to 102002543 its reverse (345200201), we get a palindrome (447202744).

The spelling of 102002543 in words is "one hundred two million, two thousand, five hundred forty-three".