1166445 has 54 divisors (see below), whose sum is σ = 2458638. Its totient is φ = 510048.

The previous prime is 1166441. The next prime is 1166453. The reversal of 1166445 is 5446611.

1166445 is a `hidden beast` number, since 1 + 16 + 644 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 933156 + 233289 = 966^2 + 483^2 .

It is not a de Polignac number, because 1166445 - 2² = 1166441 is a prime.

1166445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166441) 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 53 ways as a sum of consecutive naturals, for example, 50704 + ... + 50726.

2^1166445 is an apocalyptic number.

1166445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1166445 is the 882-nd pentagonal number.

It is an amenable number.

1166445 is an abundant number, since it is smaller than the sum of its proper divisors (1292193).

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

1166445 is a wasteful number, since it uses less digits than its factorization.

1166445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 38 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1166445 is about 1080.0208331324. The cubic root of 1166445 is about 105.2659922702.

Multiplying 1166445 by its product of digits (2880), we get a square (3359361600 = 57960²).

It can be divided in two parts, 116 and 6445, that added together give a 8-th power (6561 = 3⁸).

The spelling of 1166445 in words is "one million, one hundred sixty-six thousand, four hundred forty-five".