100645115 has 4 divisors (see below), whose sum is σ = 120774144. Its totient is φ = 80516088.

The previous prime is 100645093. The next prime is 100645141. The reversal of 100645115 is 511546001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100645115 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10064507 + ... + 10064516.

It is an arithmetic number, because the mean of its divisors is an integer number (30193536).

Almost surely, 2^100645115 is an apocalyptic number.

100645115 is a deficient number, since it is larger than the sum of its proper divisors (20129029).

100645115 is an equidigital number, since it uses as much as digits as its factorization.

100645115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20129028.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 100645115 is about 10032.2038954559. The cubic root of 100645115 is about 465.1548642080.

The spelling of 100645115 in words is "one hundred million, six hundred forty-five thousand, one hundred fifteen".