1381122 has 18 divisors (see below), whose sum is σ = 3003273. Its totient is φ = 458712.

The previous prime is 1381111. The next prime is 1381141. The reversal of 1381122 is 2211831.

It can be written as a sum of positive squares in 2 ways, for example, as 1212201 + 168921 = 1101^2 + 411^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=831.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1381095 and 1381104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4848 + ... + 5124.

2^1381122 is an apocalyptic number.

1381122 is an abundant number, since it is smaller than the sum of its proper divisors (1622151).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1381122 is an equidigital number, since it uses as much as digits as its factorization.

1381122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 282 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1381122 is about 1175.2114703320. The cubic root of 1381122 is about 111.3637930052.

Multiplying 1381122 by its sum of digits (18), we get a square (24860196 = 4986²).

1381122 divided by its sum of digits (18) gives a square (76729 = 277²).

Adding to 1381122 its reverse (2211831), we get a palindrome (3592953).

The spelling of 1381122 in words is "one million, three hundred eighty-one thousand, one hundred twenty-two".