100028125 has 12 divisors (see below), whose sum is σ = 125031060. Its totient is φ = 80020000.

The previous prime is 100028099. The next prime is 100028147. The reversal of 100028125 is 521820001.

It can be written as a sum of positive squares in 6 ways, for example, as 99780121 + 248004 = 9989^2 + 498^2 .

It is not a de Polignac number, because 100028125 - 2¹⁹ = 99503837 is a prime.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12880 + ... + 19129.

It is an arithmetic number, because the mean of its divisors is an integer number (10419255).

Almost surely, 2^100028125 is an apocalyptic number.

It is an amenable number.

100028125 is a deficient number, since it is larger than the sum of its proper divisors (25002935).

100028125 is an frugal number, since it uses more digits than its factorization.

100028125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32034 (or 32014 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 100028125 is about 10001.4061511369. The cubic root of 100028125 is about 464.2023941777.

Adding to 100028125 its reverse (521820001), we get a palindrome (621848126).

The spelling of 100028125 in words is "one hundred million, twenty-eight thousand, one hundred twenty-five".