102140243 has 4 divisors (see below), whose sum is σ = 102212088. Its totient is φ = 102068400.

The previous prime is 102140231. The next prime is 102140249. The reversal of 102140243 is 342041201.

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 102140243 - 2¹⁴ = 102123859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102140249) 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, 33746 + ... + 36647.

It is an arithmetic number, because the mean of its divisors is an integer number (25553022).

Almost surely, 2^102140243 is an apocalyptic number.

102140243 is a deficient number, since it is larger than the sum of its proper divisors (71845).

102140243 is an equidigital number, since it uses as much as digits as its factorization.

102140243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71844.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 102140243 is about 10106.4456165360. The cubic root of 102140243 is about 467.4469124806.

Adding to 102140243 its reverse (342041201), we get a palindrome (444181444).

The spelling of 102140243 in words is "one hundred two million, one hundred forty thousand, two hundred forty-three".