1338121 has 4 divisors (see below), whose sum is σ = 1416852. Its totient is φ = 1259392.

The previous prime is 1338109. The next prime is 1338167. The reversal of 1338121 is 1218331.

1338121 = T₉₄₃ + T₉₄₄ + T₉₄₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1218331 = 31 ⋅39301.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 360000 = 989^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338121 - 2¹⁹ = 813833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39340 + ... + 39373.

It is an arithmetic number, because the mean of its divisors is an integer number (354213).

2^1338121 is an apocalyptic number.

1338121 is the 945-th centered triangular number.

It is an amenable number.

1338121 is a deficient number, since it is larger than the sum of its proper divisors (78731).

1338121 is an equidigital number, since it uses as much as digits as its factorization.

1338121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78730.

The product of its digits is 144, while the sum is 19.

The square root of 1338121 is about 1156.7718011777. The cubic root of 1338121 is about 110.1958219897.

The spelling of 1338121 in words is "one million, three hundred thirty-eight thousand, one hundred twenty-one".