12345669 has 32 divisors (see below), whose sum is σ = 21181440. Its totient is φ = 6960816.

The previous prime is 12345653. The next prime is 12345701. The reversal of 12345669 is 96654321.

It is a happy number.

It is not a de Polignac number, because 12345669 - 2⁴ = 12345653 is a prime.

It is a super-2 number, since 2×12345669² = 304831086115122, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15294 + ... + 16080.

It is an arithmetic number, because the mean of its divisors is an integer number (661920).

Almost surely, 2^12345669 is an apocalyptic number.

It is an amenable number.

12345669 is a deficient number, since it is larger than the sum of its proper divisors (8835771).

12345669 is an equidigital number, since it uses as much as digits as its factorization.

12345669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 880 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 12345669 is about 3513.6404198495. The cubic root of 12345669 is about 231.1203623040.

It can be divided in two parts, 1234 and 5669, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 12345669 in words is "twelve million, three hundred forty-five thousand, six hundred sixty-nine".