100125391 has 2 divisors, whose sum is σ = 100125392. Its totient is φ = 100125390.

The previous prime is 100125353. The next prime is 100125397. The reversal of 100125391 is 193521001.

It is a strong prime.

It is an emirp because it is prime and its reverse (193521001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100125391 - 2⁹ = 100124879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100125397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50062695 + 50062696.

It is an arithmetic number, because the mean of its divisors is an integer number (50062696).

Almost surely, 2^100125391 is an apocalyptic number.

100125391 is a deficient number, since it is larger than the sum of its proper divisors (1).

100125391 is an equidigital number, since it uses as much as digits as its factorization.

100125391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 100125391 is about 10006.2675858684. The cubic root of 100125391 is about 464.3528068181.

Adding to 100125391 its reverse (193521001), we get a palindrome (293646392).

The spelling of 100125391 in words is "one hundred million, one hundred twenty-five thousand, three hundred ninety-one".