12321429 has 4 divisors (see below), whose sum is σ = 16428576. Its totient is φ = 8214284.

The previous prime is 12321409. The next prime is 12321431. The reversal of 12321429 is 92412321.

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 12321429 - 2⁷ = 12321301 is a prime.

It is a super-2 number, since 2×12321429² = 303635225204082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12321399 and 12321408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321409) 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, 2053569 + ... + 2053574.

It is an arithmetic number, because the mean of its divisors is an integer number (4107144).

Almost surely, 2^12321429 is an apocalyptic number.

It is an amenable number.

12321429 is a deficient number, since it is larger than the sum of its proper divisors (4107147).

12321429 is an equidigital number, since it uses as much as digits as its factorization.

12321429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107146.

The product of its digits is 864, while the sum is 24.

The square root of 12321429 is about 3510.1893111341. The cubic root of 12321429 is about 230.9689994193.

The spelling of 12321429 in words is "twelve million, three hundred twenty-one thousand, four hundred twenty-nine".