1228865 has 8 divisors (see below), whose sum is σ = 1608768. Its totient is φ = 893680.

The previous prime is 1228861. The next prime is 1228883. The reversal of 1228865 is 5688221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1228865 - 2² = 1228861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1228861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11117 + ... + 11226.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

2^1228865 is an apocalyptic number.

It is an amenable number.

1228865 is a deficient number, since it is larger than the sum of its proper divisors (379903).

1228865 is a wasteful number, since it uses less digits than its factorization.

1228865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22359.

The product of its digits is 7680, while the sum is 32.

The square root of 1228865 is about 1108.5418350247. The cubic root of 1228865 is about 107.1111605711. Note that the first 4 decimals are identical.

The spelling of 1228865 in words is "one million, two hundred twenty-eight thousand, eight hundred sixty-five".