1338381 has 18 divisors (see below), whose sum is σ = 2126670. Its totient is φ = 810480.

The previous prime is 1338377. The next prime is 1338391. The reversal of 1338381 is 1838331.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 4356 = 1155^2 + 66^2 .

It is not a de Polignac number, because 1338381 - 2² = 1338377 is a prime.

It is a super-2 number, since 2×1338381² = 3582527402322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338331) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 475 + ... + 1703.

2^1338381 is an apocalyptic number.

1338381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1338381 is a deficient number, since it is larger than the sum of its proper divisors (788289).

1338381 is a wasteful number, since it uses less digits than its factorization.

1338381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1243 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1338381 is about 1156.8841774352. The cubic root of 1338381 is about 110.2029586284.

The spelling of 1338381 in words is "one million, three hundred thirty-eight thousand, three hundred eighty-one".