1243312 has 40 divisors (see below), whose sum is σ = 2919456. Its totient is φ = 500736.

The previous prime is 1243309. The next prime is 1243337. The reversal of 1243312 is 2133421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578 + ... + 2230.

2^1243312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459728).

1243312 is an abundant number, since it is smaller than the sum of its proper divisors (1676144).

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

1243312 is a wasteful number, since it uses less digits than its factorization.

1243312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 679 counting only the distinct ones).

The product of its digits is 144, while the sum is 16.

The square root of 1243312 is about 1115.0390127704. The cubic root of 1243312 is about 107.5292727205.

Adding to 1243312 its reverse (2133421), we get a palindrome (3376733).

The spelling of 1243312 in words is "one million, two hundred forty-three thousand, three hundred twelve".