100078 has 8 divisors (see below), whose sum is σ = 163800. Its totient is φ = 45480.

The previous prime is 100069. The next prime is 100103. The reversal of 100078 is 870001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

100078 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253 + ... + 2296.

It is an arithmetic number, because the mean of its divisors is an integer number (20475).

2¹⁰⁰⁰⁷⁸ is an apocalyptic number.

100078 is a deficient number, since it is larger than the sum of its proper divisors (63722).

100078 is a wasteful number, since it uses less digits than its factorization.

100078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 100078 is about 316.3510708058. The cubic root of 100078 is about 46.4279533307.

Adding to 100078 its reverse (870001), we get a palindrome (970079).

The spelling of 100078 in words is "one hundred thousand, seventy-eight".