100750561 has 4 divisors (see below), whose sum is σ = 100782612. Its totient is φ = 100718512.

The previous prime is 100750549. The next prime is 100750579. The reversal of 100750561 is 165057001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85100625 + 15649936 = 9225^2 + 3956^2 .

It is a cyclic number.

It is not a de Polignac number, because 100750561 - 2¹¹ = 100748513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100750541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10726 + ... + 17791.

It is an arithmetic number, because the mean of its divisors is an integer number (25195653).

Almost surely, 2^100750561 is an apocalyptic number.

It is an amenable number.

100750561 is a deficient number, since it is larger than the sum of its proper divisors (32051).

100750561 is an equidigital number, since it uses as much as digits as its factorization.

100750561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32050.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 100750561 is about 10037.4578953040. The cubic root of 100750561 is about 465.3172552666.

The spelling of 100750561 in words is "one hundred million, seven hundred fifty thousand, five hundred sixty-one".