1338981 has 8 divisors (see below), whose sum is σ = 2040384. Its totient is φ = 765120.

The previous prime is 1338979. The next prime is 1339001. The reversal of 1338981 is 1898331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1338981 - 2¹ = 1338979 is a prime.

It is a super-2 number, since 2×1338981² = 3585740236722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338941) 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 in 7 ways as a sum of consecutive naturals, for example, 31860 + ... + 31901.

It is an arithmetic number, because the mean of its divisors is an integer number (255048).

2^1338981 is an apocalyptic number.

It is an amenable number.

1338981 is a deficient number, since it is larger than the sum of its proper divisors (701403).

1338981 is an equidigital number, since it uses as much as digits as its factorization.

1338981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63771.

The product of its digits is 5184, while the sum is 33.

The square root of 1338981 is about 1157.1434656083. The cubic root of 1338981 is about 110.2194242678.

The spelling of 1338981 in words is "one million, three hundred thirty-eight thousand, nine hundred eighty-one".