1243424 has 72 divisors (see below), whose sum is σ = 3116988. Its totient is φ = 483840.

The previous prime is 1243421. The next prime is 1243427. The reversal of 1243424 is 4243421.

It is an interprime number because it is at equal distance from previous prime (1243421) and next prime (1243427).

It can be written as a sum of positive squares in 2 ways, for example, as 960400 + 283024 = 980^2 + 532^2 .

It is a super-2 number, since 2×1243424² = 3092206487552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1243396 and 1243405.

It is not an unprimeable number, because it can be changed into a prime (1243421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20354 + ... + 20414.

2^1243424 is an apocalyptic number.

1243424 is a gapful number since it is divisible by the number (14) 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 1243424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558494).

1243424 is an abundant number, since it is smaller than the sum of its proper divisors (1873564).

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

1243424 is a wasteful number, since it uses less digits than its factorization.

1243424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 83 counting only the distinct ones).

The product of its digits is 768, while the sum is 20.

The square root of 1243424 is about 1115.0892340974. The cubic root of 1243424 is about 107.5325014399.

Adding to 1243424 its reverse (4243421), we get a palindrome (5486845).

The spelling of 1243424 in words is "one million, two hundred forty-three thousand, four hundred twenty-four".