1239424 has 32 divisors (see below), whose sum is σ = 2582640. Its totient is φ = 591360.

The previous prime is 1239421. The next prime is 1239443. The reversal of 1239424 is 4249321.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2734 + ... + 3154.

2^1239424 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 1239424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291320).

1239424 is an abundant number, since it is smaller than the sum of its proper divisors (1343216).

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

1239424 is an equidigital number, since it uses as much as digits as its factorization.

1239424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 446 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 1239424 is about 1113.2942108895. The cubic root of 1239424 is about 107.4170696259.

The spelling of 1239424 in words is "one million, two hundred thirty-nine thousand, four hundred twenty-four".