13442381 has 2 divisors, whose sum is σ = 13442382. Its totient is φ = 13442380.

The previous prime is 13442371. The next prime is 13442417. The reversal of 13442381 is 18324431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11162281 + 2280100 = 3341^2 + 1510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13442381 is a prime.

It is a super-2 number, since 2×13442381² = 361395213898322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13442381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13442371) 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, 6721190 + 6721191.

It is an arithmetic number, because the mean of its divisors is an integer number (6721191).

Almost surely, 2^13442381 is an apocalyptic number.

It is an amenable number.

13442381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13442381 is an equidigital number, since it uses as much as digits as its factorization.

13442381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 13442381 is about 3666.3852770815. The cubic root of 13442381 is about 237.7709174384.

The spelling of 13442381 in words is "thirteen million, four hundred forty-two thousand, three hundred eighty-one".