12321145 has 8 divisors (see below), whose sum is σ = 14805504. Its totient is φ = 9843504.

The previous prime is 12321137. The next prime is 12321149. The reversal of 12321145 is 54112321.

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

It is a cyclic number.

It is not a de Polignac number, because 12321145 - 2³ = 12321137 is a prime.

It is a super-2 number, since 2×12321145² = 303621228222050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321149) 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 7 ways as a sum of consecutive naturals, for example, 4302 + ... + 6568.

It is an arithmetic number, because the mean of its divisors is an integer number (1850688).

Almost surely, 2^12321145 is an apocalyptic number.

It is an amenable number.

12321145 is a deficient number, since it is larger than the sum of its proper divisors (2484359).

12321145 is a wasteful number, since it uses less digits than its factorization.

12321145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359.

The product of its digits is 240, while the sum is 19.

The square root of 12321145 is about 3510.1488572424. The cubic root of 12321145 is about 230.9672248497.

Adding to 12321145 its reverse (54112321), we get a palindrome (66433466).

It can be divided in two parts, 123211 and 45, that added together give a triangular number (123256 = T₄₉₆).

The spelling of 12321145 in words is "twelve million, three hundred twenty-one thousand, one hundred forty-five".