1211085 has 16 divisors (see below), whose sum is σ = 2153280. Its totient is φ = 645840.

The previous prime is 1211083. The next prime is 1211087. The reversal of 1211085 is 5801121.

It is an interprime number because it is at equal distance from previous prime (1211083) and next prime (1211087).

It is not a de Polignac number, because 1211085 - 2¹ = 1211083 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4351 + ... + 4620.

It is an arithmetic number, because the mean of its divisors is an integer number (134580).

2^1211085 is an apocalyptic number.

1211085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211085 is a deficient number, since it is larger than the sum of its proper divisors (942195).

1211085 is an equidigital number, since it uses as much as digits as its factorization.

1211085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8985 (or 8979 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1211085 is about 1100.4930713094. The cubic root of 1211085 is about 106.5920648067.

The spelling of 1211085 in words is "one million, two hundred eleven thousand, eighty-five".