12138469 has 4 divisors (see below), whose sum is σ = 13872544. Its totient is φ = 10404396.

The previous prime is 12138461. The next prime is 12138481. The reversal of 12138469 is 96483121.

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 a cyclic number.

It is not a de Polignac number, because 12138469 - 2³ = 12138461 is a prime.

It is a super-2 number, since 2×12138469² = 294684859327922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138461) 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, 867027 + ... + 867040.

It is an arithmetic number, because the mean of its divisors is an integer number (3468136).

Almost surely, 2^12138469 is an apocalyptic number.

It is an amenable number.

12138469 is a deficient number, since it is larger than the sum of its proper divisors (1734075).

12138469 is an equidigital number, since it uses as much as digits as its factorization.

12138469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734074.

The product of its digits is 10368, while the sum is 34.

The square root of 12138469 is about 3484.0305681782. The cubic root of 12138469 is about 229.8200798340.

The spelling of 12138469 in words is "twelve million, one hundred thirty-eight thousand, four hundred sixty-nine".