13047442 has 4 divisors (see below), whose sum is σ = 19571166. Its totient is φ = 6523720.

The previous prime is 13047439. The next prime is 13047443. The reversal of 13047442 is 24474031.

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., 9554281 + 3493161 = 3091^2 + 1869^2 .

It is not an unprimeable number, because it can be changed into a prime (13047443) 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 as a sum of consecutive naturals, namely, 3261859 + ... + 3261862.

Almost surely, 2^13047442 is an apocalyptic number.

13047442 is a deficient number, since it is larger than the sum of its proper divisors (6523724).

13047442 is an equidigital number, since it uses as much as digits as its factorization.

13047442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523723.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 13047442 is about 3612.1243057237. The cubic root of 13047442 is about 235.4191523515.

The spelling of 13047442 in words is "thirteen million, forty-seven thousand, four hundred forty-two".