12125009 has 8 divisors (see below), whose sum is σ = 13132392. Its totient is φ = 11128320.

The previous prime is 12124997. The next prime is 12125023. The reversal of 12125009 is 90052121.

It can be written as a sum of positive squares in 4 ways, for example, as 70225 + 12054784 = 265^2 + 3472^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12125009 - 2⁴ = 12124993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12125609) 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, 224 + ... + 4929.

It is an arithmetic number, because the mean of its divisors is an integer number (1641549).

Almost surely, 2^12125009 is an apocalyptic number.

It is an amenable number.

12125009 is a deficient number, since it is larger than the sum of its proper divisors (1007383).

12125009 is a wasteful number, since it uses less digits than its factorization.

12125009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5347.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 12125009 is about 3482.0983616205. The cubic root of 12125009 is about 229.7351014520.

The spelling of 12125009 in words is "twelve million, one hundred twenty-five thousand, nine".