102855939 has 16 divisors (see below), whose sum is σ = 140313600. Its totient is φ = 66998816.

The previous prime is 102855937. The next prime is 102855979. The reversal of 102855939 is 939558201.

It is a cyclic number.

It is not a de Polignac number, because 102855939 - 2¹ = 102855937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102855939.

It is not an unprimeable number, because it can be changed into a prime (102855937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28942 + ... + 32300.

It is an arithmetic number, because the mean of its divisors is an integer number (8769600).

Almost surely, 2^102855939 is an apocalyptic number.

102855939 is a deficient number, since it is larger than the sum of its proper divisors (37457661).

102855939 is a wasteful number, since it uses less digits than its factorization.

102855939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 102855939 is about 10141.7917056110. The cubic root of 102855939 is about 468.5361714154.

The spelling of 102855939 in words is "one hundred two million, eight hundred fifty-five thousand, nine hundred thirty-nine".