125905103 has 2 divisors, whose sum is σ = 125905104. Its totient is φ = 125905102.

The previous prime is 125905097. The next prime is 125905121. The reversal of 125905103 is 301509521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125905103 - 2²⁰ = 124856527 is a prime.

It is a super-2 number, since 2×125905103² = 31704189922881218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125905123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62952551 + 62952552.

It is an arithmetic number, because the mean of its divisors is an integer number (62952552).

Almost surely, 2^125905103 is an apocalyptic number.

125905103 is a deficient number, since it is larger than the sum of its proper divisors (1).

125905103 is an equidigital number, since it uses as much as digits as its factorization.

125905103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 125905103 is about 11220.7443157751. The cubic root of 125905103 is about 501.2039029090.

The spelling of 125905103 in words is "one hundred twenty-five million, nine hundred five thousand, one hundred three".