12138429 has 8 divisors (see below), whose sum is σ = 16389760. Its totient is φ = 7989696.

The previous prime is 12138421. The next prime is 12138449. The reversal of 12138429 is 92483121.

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

It is not a de Polignac number, because 12138429 - 2³ = 12138421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12138396 and 12138405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138421) 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, 25372 + ... + 25845.

It is an arithmetic number, because the mean of its divisors is an integer number (2048720).

Almost surely, 2^12138429 is an apocalyptic number.

It is an amenable number.

12138429 is a deficient number, since it is larger than the sum of its proper divisors (4251331).

12138429 is an equidigital number, since it uses as much as digits as its factorization.

12138429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51299.

The product of its digits is 3456, while the sum is 30.

The square root of 12138429 is about 3484.0248276957. The cubic root of 12138429 is about 229.8198273910.

The spelling of 12138429 in words is "twelve million, one hundred thirty-eight thousand, four hundred twenty-nine".