1338581 has 2 divisors, whose sum is σ = 1338582. Its totient is φ = 1338580.

The previous prime is 1338559. The next prime is 1338587. The reversal of 1338581 is 1858331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 27556 = 1145^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338581 - 2⁶ = 1338517 is a prime.

It is a super-2 number, since 2×1338581² = 3583598187122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338587) 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, 669290 + 669291.

It is an arithmetic number, because the mean of its divisors is an integer number (669291).

2^1338581 is an apocalyptic number.

It is an amenable number.

1338581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338581 is an equidigital number, since it uses as much as digits as its factorization.

1338581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 1338581 is about 1156.9706132828. The cubic root of 1338581 is about 110.2084477216.

The spelling of 1338581 in words is "one million, three hundred thirty-eight thousand, five hundred eighty-one".