100172105 has 8 divisors (see below), whose sum is σ = 131134464. Its totient is φ = 72852400.

The previous prime is 100172089. The next prime is 100172113. The reversal of 100172105 is 501271001.

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

It is not a de Polignac number, because 100172105 - 2⁴ = 100172089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910601 + ... + 910710.

It is an arithmetic number, because the mean of its divisors is an integer number (16391808).

Almost surely, 2^100172105 is an apocalyptic number.

It is an amenable number.

100172105 is a deficient number, since it is larger than the sum of its proper divisors (30962359).

100172105 is a wasteful number, since it uses less digits than its factorization.

100172105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821327.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 100172105 is about 10008.6015506663. The cubic root of 100172105 is about 464.4250109621.

The spelling of 100172105 in words is "one hundred million, one hundred seventy-two thousand, one hundred five".