12625009 has 4 divisors (see below), whose sum is σ = 12636160. Its totient is φ = 12613860.

The previous prime is 12624991. The next prime is 12625027. The reversal of 12625009 is 90052621.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (12624991) and next prime (12625027).

It is a cyclic number.

It is not a de Polignac number, because 12625009 - 2⁹ = 12624497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12625079) 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, 3657 + ... + 6214.

It is an arithmetic number, because the mean of its divisors is an integer number (3159040).

Almost surely, 2^12625009 is an apocalyptic number.

It is an amenable number.

12625009 is a deficient number, since it is larger than the sum of its proper divisors (11151).

12625009 is an equidigital number, since it uses as much as digits as its factorization.

12625009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11150.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12625009 is about 3553.1688673633. The cubic root of 12625009 is about 232.8505307210.

The spelling of 12625009 in words is "twelve million, six hundred twenty-five thousand, nine".