102100125 has 16 divisors (see below), whose sum is σ = 169895232. Its totient is φ = 54453200.

The previous prime is 102100123. The next prime is 102100169. The reversal of 102100125 is 521001201.

It is not a de Polignac number, because 102100125 - 2¹ = 102100123 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102100125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135759 + ... + 136508.

It is an arithmetic number, because the mean of its divisors is an integer number (10618452).

Almost surely, 2^102100125 is an apocalyptic number.

102100125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102100125 is a deficient number, since it is larger than the sum of its proper divisors (67795107).

102100125 is an equidigital number, since it uses as much as digits as its factorization.

102100125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272285 (or 272275 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 102100125 is about 10104.4606486442. The cubic root of 102100125 is about 467.3857041835.

Adding to 102100125 its reverse (521001201), we get a palindrome (623101326).

The spelling of 102100125 in words is "one hundred two million, one hundred thousand, one hundred twenty-five".