1165945 has 32 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 752640.

The previous prime is 1165943. The next prime is 1165949. The reversal of 1165945 is 5495611.

1165945 = T₁₅₄ + T₁₅₅ + ... + T₂₁₉.

It is not a de Polignac number, because 1165945 - 2¹ = 1165943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165943) 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 31 ways as a sum of consecutive naturals, for example, 27094 + ... + 27136.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2^1165945 is an apocalyptic number.

It is an amenable number.

1165945 is a deficient number, since it is larger than the sum of its proper divisors (544775).

1165945 is a wasteful number, since it uses less digits than its factorization.

1165945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105.

The product of its digits is 5400, while the sum is 31.

The square root of 1165945 is about 1079.7893313050. The cubic root of 1165945 is about 105.2509492639.

It can be divided in two parts, 11 and 65945, that added together give a palindrome (65956).

The spelling of 1165945 in words is "one million, one hundred sixty-five thousand, nine hundred forty-five".