13123442 has 4 divisors (see below), whose sum is σ = 19685166. Its totient is φ = 6561720.

The previous prime is 13123441. The next prime is 13123459. The reversal of 13123442 is 24432131.

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

It can be written as a sum of positive squares in only one way, i.e., 10297681 + 2825761 = 3209^2 + 1681^2 .

It is not an unprimeable number, because it can be changed into a prime (13123441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280859 + ... + 3280862.

Almost surely, 2^13123442 is an apocalyptic number.

13123442 is a deficient number, since it is larger than the sum of its proper divisors (6561724).

13123442 is an equidigital number, since it uses as much as digits as its factorization.

13123442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561723.

The product of its digits is 576, while the sum is 20.

The square root of 13123442 is about 3622.6291557376. The cubic root of 13123442 is about 235.8753651008.

Adding to 13123442 its reverse (24432131), we get a palindrome (37555573).

The spelling of 13123442 in words is "thirteen million, one hundred twenty-three thousand, four hundred forty-two".