1331121 has 24 divisors (see below), whose sum is σ = 2064160. Its totient is φ = 760320.

The previous prime is 1331119. The next prime is 1331123. The reversal of 1331121 is 1211331.

It is an interprime number because it is at equal distance from previous prime (1331119) and next prime (1331123).

It is not a de Polignac number, because 1331121 - 2¹ = 1331119 is a prime.

It is a super-4 number, since 4×1331121⁴ (a number of 26 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331097 and 1331106.

It is not an unprimeable number, because it can be changed into a prime (1331123) 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 23 ways as a sum of consecutive naturals, for example, 6801 + ... + 6993.

2^1331121 is an apocalyptic number.

1331121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1331121 is a deficient number, since it is larger than the sum of its proper divisors (733039).

1331121 is a wasteful number, since it uses less digits than its factorization.

1331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 226 counting only the distinct ones).

The product of its digits is 18, while the sum is 12.

The square root of 1331121 is about 1153.7421722378. The cubic root of 1331121 is about 110.0033332323.

Adding to 1331121 its reverse (1211331), we get a palindrome (2542452).

It can be divided in two parts, 1331 and 121, that multiplied together give a 5-th power (161051 = 11⁵).

The spelling of 1331121 in words is "one million, three hundred thirty-one thousand, one hundred twenty-one".