102855239 has 2 divisors, whose sum is σ = 102855240. Its totient is φ = 102855238.

The previous prime is 102855229. The next prime is 102855307. The reversal of 102855239 is 932558201.

It is a weak prime.

It is an emirp because it is prime and its reverse (932558201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102855239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102855199 and 102855208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102855229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51427619 + 51427620.

It is an arithmetic number, because the mean of its divisors is an integer number (51427620).

Almost surely, 2^102855239 is an apocalyptic number.

102855239 is a deficient number, since it is larger than the sum of its proper divisors (1).

102855239 is an equidigital number, since it uses as much as digits as its factorization.

102855239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 102855239 is about 10141.7571948849. The cubic root of 102855239 is about 468.5351085175.

The spelling of 102855239 in words is "one hundred two million, eight hundred fifty-five thousand, two hundred thirty-nine".