12025309 has 4 divisors (see below), whose sum is σ = 12658240. Its totient is φ = 11392380.

The previous prime is 12025283. The next prime is 12025319. The reversal of 12025309 is 90352021.

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 an emirpimes, since its reverse is a distinct semiprime: 90352021 = 683 ⋅132287.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12025309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12025309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12025319) 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, 316437 + ... + 316474.

It is an arithmetic number, because the mean of its divisors is an integer number (3164560).

Almost surely, 2^12025309 is an apocalyptic number.

12025309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12025309 is a deficient number, since it is larger than the sum of its proper divisors (632931).

12025309 is an equidigital number, since it uses as much as digits as its factorization.

12025309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632930.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 12025309 is about 3467.7527305158. The cubic root of 12025309 is about 229.1036886705.

The spelling of 12025309 in words is "twelve million, twenty-five thousand, three hundred nine".