102028243 has 4 divisors (see below), whose sum is σ = 102068208. Its totient is φ = 101988280.

The previous prime is 102028219. The next prime is 102028249. The reversal of 102028243 is 342820201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102028243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102028249) 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, 15871 + ... + 21352.

It is an arithmetic number, because the mean of its divisors is an integer number (25517052).

Almost surely, 2^102028243 is an apocalyptic number.

102028243 is a deficient number, since it is larger than the sum of its proper divisors (39965).

102028243 is an equidigital number, since it uses as much as digits as its factorization.

102028243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39964.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 102028243 is about 10100.9030784381. The cubic root of 102028243 is about 467.2759932285.

Adding to 102028243 its reverse (342820201), we get a palindrome (444848444).

The spelling of 102028243 in words is "one hundred two million, twenty-eight thousand, two hundred forty-three".