1224855 has 32 divisors (see below), whose sum is σ = 2238720. Its totient is φ = 635040.

The previous prime is 1224851. The next prime is 1224857. The reversal of 1224855 is 5584221.

It is a happy number.

It is not a de Polignac number, because 1224855 - 2² = 1224851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224851) 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, 5700 + ... + 5910.

It is an arithmetic number, because the mean of its divisors is an integer number (69960).

2^1224855 is an apocalyptic number.

1224855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1224855 is a deficient number, since it is larger than the sum of its proper divisors (1013865).

1224855 is a wasteful number, since it uses less digits than its factorization.

1224855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 262 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1224855 is about 1106.7316747975. The cubic root of 1224855 is about 106.9945261706.

The spelling of 1224855 in words is "one million, two hundred twenty-four thousand, eight hundred fifty-five".