1281185 has 16 divisors (see below), whose sum is σ = 1615680. Its totient is φ = 974400.

The previous prime is 1281167. The next prime is 1281187. The reversal of 1281185 is 5811821.

It is not a de Polignac number, because 1281185 - 2¹⁰ = 1280161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281187) 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, 12635 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (100980).

2^1281185 is an apocalyptic number.

It is an amenable number.

1281185 is a deficient number, since it is larger than the sum of its proper divisors (334495).

1281185 is a wasteful number, since it uses less digits than its factorization.

1281185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its digits is 640, while the sum is 26.

The square root of 1281185 is about 1131.8944297062. The cubic root of 1281185 is about 108.6102004218.

The spelling of 1281185 in words is "one million, two hundred eighty-one thousand, one hundred eighty-five".