125905205 has 8 divisors (see below), whose sum is σ = 151258272. Its totient is φ = 100609488.

The previous prime is 125905193. The next prime is 125905207. The reversal of 125905205 is 502509521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125905205 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125905207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9347 + ... + 18416.

It is an arithmetic number, because the mean of its divisors is an integer number (18907284).

Almost surely, 2^125905205 is an apocalyptic number.

It is an amenable number.

125905205 is a deficient number, since it is larger than the sum of its proper divisors (25353067).

125905205 is an equidigital number, since it uses as much as digits as its factorization.

125905205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28675.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 125905205 is about 11220.7488609272. The cubic root of 125905205 is about 501.2040382564.

The spelling of 125905205 in words is "one hundred twenty-five million, nine hundred five thousand, two hundred five".