12321542 has 4 divisors (see below), whose sum is σ = 18482316. Its totient is φ = 6160770.

The previous prime is 12321541. The next prime is 12321559. The reversal of 12321542 is 24512321.

12321542 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3080384 + ... + 3080387.

It is an arithmetic number, because the mean of its divisors is an integer number (4620579).

Almost surely, 2^12321542 is an apocalyptic number.

12321542 is a deficient number, since it is larger than the sum of its proper divisors (6160774).

12321542 is an equidigital number, since it uses as much as digits as its factorization.

12321542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160773.

The product of its digits is 480, while the sum is 20.

The square root of 12321542 is about 3510.2054070951. The cubic root of 12321542 is about 230.9697054904.

Adding to 12321542 its reverse (24512321), we get a palindrome (36833863).

The spelling of 12321542 in words is "twelve million, three hundred twenty-one thousand, five hundred forty-two".