100280825 has 12 divisors (see below), whose sum is σ = 126457680. Its totient is φ = 78863760.

The previous prime is 100280819. The next prime is 100280827. The reversal of 100280825 is 528082001.

It is not a de Polignac number, because 100280825 - 2¹⁴ = 100264441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100280794 and 100280803.

It is not an unprimeable number, because it can be changed into a prime (100280827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32519 + ... + 35468.

It is an arithmetic number, because the mean of its divisors is an integer number (10538140).

Almost surely, 2^100280825 is an apocalyptic number.

It is an amenable number.

100280825 is a deficient number, since it is larger than the sum of its proper divisors (26176855).

100280825 is an equidigital number, since it uses as much as digits as its factorization.

100280825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68056 (or 68051 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 100280825 is about 10014.0314059823. The cubic root of 100280825 is about 464.5929686692.

The spelling of 100280825 in words is "one hundred million, two hundred eighty thousand, eight hundred twenty-five".