1227312 has 50 divisors (see below), whose sum is σ = 3555948. Its totient is φ = 408672.

The previous prime is 1227301. The next prime is 1227319. The reversal of 1227312 is 2137221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1227319) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 823 + ... + 1769.

2^1227312 is an apocalyptic number.

1227312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1227312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1777974).

1227312 is an abundant number, since it is smaller than the sum of its proper divisors (2328636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1227312 is an equidigital number, since it uses as much as digits as its factorization.

1227312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 952 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 1227312 is about 1107.8411438469. The cubic root of 1227312 is about 107.0660203387.

Subtracting 1227312 from its reverse (2137221), we obtain a palindrome (909909).

The spelling of 1227312 in words is "one million, two hundred twenty-seven thousand, three hundred twelve".