1338881 has 2 divisors, whose sum is σ = 1338882. Its totient is φ = 1338880.

The previous prime is 1338877. The next prime is 1338907. The reversal of 1338881 is 1888331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 128881 = 1100^2 + 359^2 .

It is an emirp because it is prime and its reverse (1888331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338881 - 2² = 1338877 is a prime.

It is a super-2 number, since 2×1338881² = 3585204664322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1338811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669440 + 669441.

It is an arithmetic number, because the mean of its divisors is an integer number (669441).

2^1338881 is an apocalyptic number.

It is an amenable number.

1338881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338881 is an equidigital number, since it uses as much as digits as its factorization.

1338881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 1338881 is about 1157.1002549477. The cubic root of 1338881 is about 110.2166803362.

The spelling of 1338881 in words is "one million, three hundred thirty-eight thousand, eight hundred eighty-one".