100881145 has 8 divisors (see below), whose sum is σ = 128178504. Its totient is φ = 75957504.

The previous prime is 100881133. The next prime is 100881173. The reversal of 100881145 is 541188001.

It can be written as a sum of positive squares in 4 ways, for example, as 31125241 + 69755904 = 5579^2 + 8352^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100881145 - 2⁵ = 100881113 is a prime.

It is a super-2 number, since 2×100881145² = 20354010833022050, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 593334 + ... + 593503.

It is an arithmetic number, because the mean of its divisors is an integer number (16022313).

Almost surely, 2^100881145 is an apocalyptic number.

It is an amenable number.

100881145 is a deficient number, since it is larger than the sum of its proper divisors (27297359).

100881145 is a wasteful number, since it uses less digits than its factorization.

100881145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186859.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 100881145 is about 10043.9606231805. The cubic root of 100881145 is about 465.5182028837.

The spelling of 100881145 in words is "one hundred million, eight hundred eighty-one thousand, one hundred forty-five".