1081445 has 4 divisors (see below), whose sum is σ = 1297740. Its totient is φ = 865152.

The previous prime is 1081441. The next prime is 1081477. The reversal of 1081445 is 5441801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5441801 = 47 ⋅115783.

It can be written as a sum of positive squares in 2 ways, for example, as 850084 + 231361 = 922^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081445 - 2² = 1081441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1081445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081441) 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, 108140 + ... + 108149.

It is an arithmetic number, because the mean of its divisors is an integer number (324435).

2^1081445 is an apocalyptic number.

It is an amenable number.

1081445 is a deficient number, since it is larger than the sum of its proper divisors (216295).

1081445 is an equidigital number, since it uses as much as digits as its factorization.

1081445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216294.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1081445 is about 1039.9254780993. The cubic root of 1081445 is about 102.6442940981.

The spelling of 1081445 in words is "one million, eighty-one thousand, four hundred forty-five".