102143239 has 12 divisors (see below), whose sum is σ = 112786128. Its totient is φ = 92433440.

The previous prime is 102143159. The next prime is 102143257. The reversal of 102143239 is 932341201.

It is not a de Polignac number, because 102143239 - 2¹⁵ = 102110471 is a prime.

It is a super-2 number, since 2×102143239² = 20866482546822242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102143269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26382 + ... + 30004.

It is an arithmetic number, because the mean of its divisors is an integer number (9398844).

Almost surely, 2^102143239 is an apocalyptic number.

102143239 is a deficient number, since it is larger than the sum of its proper divisors (10642889).

102143239 is a wasteful number, since it uses less digits than its factorization.

102143239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878 (or 3867 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 102143239 is about 10106.5938376883. The cubic root of 102143239 is about 467.4514828543.

It can be divided in two parts, 102 and 143239, that added together give a palindrome (143341).

The spelling of 102143239 in words is "one hundred two million, one hundred forty-three thousand, two hundred thirty-nine".