12320442 has 12 divisors (see below), whose sum is σ = 26694330. Its totient is φ = 4106808.

The previous prime is 12320431. The next prime is 12320443. The reversal of 12320442 is 24402321.

It can be written as a sum of positive squares in only one way, i.e., 7080921 + 5239521 = 2661^2 + 2289^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 684469 = 12320442 / (1 + 2 + 3 + 2 + 0 + 4 + 4 + 2).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12320443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342217 + ... + 342252.

Almost surely, 2^12320442 is an apocalyptic number.

12320442 is an abundant number, since it is smaller than the sum of its proper divisors (14373888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12320442 is a wasteful number, since it uses less digits than its factorization.

12320442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684477 (or 684474 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12320442 is about 3510.0487176106. The cubic root of 12320442 is about 230.9628320478.

Adding to 12320442 its reverse (24402321), we get a palindrome (36722763).

The spelling of 12320442 in words is "twelve million, three hundred twenty thousand, four hundred forty-two".