1105945 has 8 divisors (see below), whose sum is σ = 1332936. Its totient is φ = 880896.

The previous prime is 1105943. The next prime is 1105961. The reversal of 1105945 is 5495011.

It can be written as a sum of positive squares in 4 ways, for example, as 168921 + 937024 = 411^2 + 968^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1105945 - 2¹ = 1105943 is a prime.

It is a super-2 number, since 2×1105945² = 2446228686050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1105943) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1569 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (166617).

2^1105945 is an apocalyptic number.

It is an amenable number.

1105945 is a deficient number, since it is larger than the sum of its proper divisors (226991).

1105945 is an equidigital number, since it uses as much as digits as its factorization.

1105945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1105945 is about 1051.6391966830. The cubic root of 1105945 is about 103.4136443527.

The spelling of 1105945 in words is "one million, one hundred five thousand, nine hundred forty-five".