102239985 has 16 divisors (see below), whose sum is σ = 163863936. Its totient is φ = 54434688.

The previous prime is 102239971. The next prime is 102240001. The reversal of 102239985 is 589932201.

It is a de Polignac number, because none of the positive numbers 2^k-102239985 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3732 + ... + 14778.

It is an arithmetic number, because the mean of its divisors is an integer number (10241496).

Almost surely, 2^102239985 is an apocalyptic number.

102239985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102239985 is a deficient number, since it is larger than the sum of its proper divisors (61623951).

102239985 is a wasteful number, since it uses less digits than its factorization.

102239985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11672.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 102239985 is about 10111.3789860731. The cubic root of 102239985 is about 467.5990200807.

The spelling of 102239985 in words is "one hundred two million, two hundred thirty-nine thousand, nine hundred eighty-five".