125758909 has 4 divisors (see below), whose sum is σ = 129815680. Its totient is φ = 121702140.

The previous prime is 125758879. The next prime is 125758921. The reversal of 125758909 is 909857521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125758909 - 2¹⁵ = 125726141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125758939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028339 + ... + 2028400.

It is an arithmetic number, because the mean of its divisors is an integer number (32453920).

Almost surely, 2^125758909 is an apocalyptic number.

It is an amenable number.

125758909 is a deficient number, since it is larger than the sum of its proper divisors (4056771).

125758909 is an equidigital number, since it uses as much as digits as its factorization.

125758909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056770.

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 125758909 is about 11214.2279716439. The cubic root of 125758909 is about 501.0098377490.

The spelling of 125758909 in words is "one hundred twenty-five million, seven hundred fifty-eight thousand, nine hundred nine".