102006178 has 4 divisors (see below), whose sum is σ = 153009270. Its totient is φ = 51003088.

The previous prime is 102006133. The next prime is 102006209. The reversal of 102006178 is 871600201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 871600201 = 1669 ⋅522229.

It can be written as a sum of positive squares in only one way, i.e., 55398249 + 46607929 = 7443^2 + 6827^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25501543 + ... + 25501546.

Almost surely, 2^102006178 is an apocalyptic number.

102006178 is a deficient number, since it is larger than the sum of its proper divisors (51003092).

102006178 is an equidigital number, since it uses as much as digits as its factorization.

102006178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51003091.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 102006178 is about 10099.8107903069. The cubic root of 102006178 is about 467.2423058630.

Adding to 102006178 its reverse (871600201), we get a palindrome (973606379).

The spelling of 102006178 in words is "one hundred two million, six thousand, one hundred seventy-eight".