1172985 has 16 divisors (see below), whose sum is σ = 2047680. Its totient is φ = 568640.

The previous prime is 1172981. The next prime is 1172993. The reversal of 1172985 is 5892711.

It is not a de Polignac number, because 1172985 - 2² = 1172981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1172981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3390 + ... + 3719.

It is an arithmetic number, because the mean of its divisors is an integer number (127980).

2^1172985 is an apocalyptic number.

1172985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1172985 is a deficient number, since it is larger than the sum of its proper divisors (874695).

1172985 is a wasteful number, since it uses less digits than its factorization.

1172985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128.

The product of its digits is 5040, while the sum is 33.

The square root of 1172985 is about 1083.0443204228. The cubic root of 1172985 is about 105.4623601341.

The spelling of 1172985 in words is "one million, one hundred seventy-two thousand, nine hundred eighty-five".