1166945 has 12 divisors (see below), whose sum is σ = 1517436. Its totient is φ = 861120.

The previous prime is 1166929. The next prime is 1166947. The reversal of 1166945 is 5496611.

It can be written as a sum of positive squares in 6 ways, for example, as 253009 + 913936 = 503^2 + 956^2 .

It is not a de Polignac number, because 1166945 - 2⁴ = 1166929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155 + ... + 1535.

It is an arithmetic number, because the mean of its divisors is an integer number (126453).

2^1166945 is an apocalyptic number.

It is an amenable number.

1166945 is a deficient number, since it is larger than the sum of its proper divisors (350491).

1166945 is a wasteful number, since it uses less digits than its factorization.

1166945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1399 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 1166945 is about 1080.2522853482. The cubic root of 1166945 is about 105.2810309782.

It can be divided in two parts, 1166 and 945, that multiplied together give a triangular number (1101870 = T₁₄₈₄).

The spelling of 1166945 in words is "one million, one hundred sixty-six thousand, nine hundred forty-five".