125958909 has 4 divisors (see below), whose sum is σ = 167945216. Its totient is φ = 83972604.

The previous prime is 125958893. The next prime is 125958913. The reversal of 125958909 is 909859521.

It is a happy number.

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 not a de Polignac number, because 125958909 - 2⁴ = 125958893 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 (125958949) 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, 20993149 + ... + 20993154.

It is an arithmetic number, because the mean of its divisors is an integer number (41986304).

Almost surely, 2^125958909 is an apocalyptic number.

It is an amenable number.

125958909 is a deficient number, since it is larger than the sum of its proper divisors (41986307).

125958909 is an equidigital number, since it uses as much as digits as its factorization.

125958909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41986306.

The product of its (nonzero) digits is 291600, while the sum is 48.

The square root of 125958909 is about 11223.1416724552. The cubic root of 125958909 is about 501.2752898395.

The spelling of 125958909 in words is "one hundred twenty-five million, nine hundred fifty-eight thousand, nine hundred nine".