1208865 has 32 divisors (see below), whose sum is σ = 2292480. Its totient is φ = 532224.

The previous prime is 1208863. The next prime is 1208873. The reversal of 1208865 is 5688021.

It is not a de Polignac number, because 1208865 - 2¹ = 1208863 is a prime.

It is a super-2 number, since 2×1208865² = 2922709176450, which contains 22 as substring.

It is an Ulam number.

1208865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1208863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2847 + ... + 3243.

It is an arithmetic number, because the mean of its divisors is an integer number (71640).

2^1208865 is an apocalyptic number.

1208865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1208865 is a deficient number, since it is larger than the sum of its proper divisors (1083615).

1208865 is a wasteful number, since it uses less digits than its factorization.

1208865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1208865 is about 1099.4839698695. The cubic root of 1208865 is about 106.5268948364.

The spelling of 1208865 in words is "one million, two hundred eight thousand, eight hundred sixty-five".