1331145 has 12 divisors (see below), whose sum is σ = 2307396. Its totient is φ = 709920.

The previous prime is 1331123. The next prime is 1331153. The reversal of 1331145 is 5411331.

It can be written as a sum of positive squares in 2 ways, for example, as 741321 + 589824 = 861^2 + 768^2 .

It is not a de Polignac number, because 1331145 - 2⁹ = 1330633 is a prime.

It is a super-2 number, since 2×1331145² = 3543894022050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 14746 + ... + 14835.

It is an arithmetic number, because the mean of its divisors is an integer number (192283).

2^1331145 is an apocalyptic number.

1331145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331145 is a deficient number, since it is larger than the sum of its proper divisors (976251).

1331145 is a wasteful number, since it uses less digits than its factorization.

1331145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29592 (or 29589 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 1331145 is about 1153.7525731282. The cubic root of 1331145 is about 110.0039943453.

Adding to 1331145 its reverse (5411331), we get a palindrome (6742476).

The spelling of 1331145 in words is "one million, three hundred thirty-one thousand, one hundred forty-five".