1247424 has 56 divisors (see below), whose sum is σ = 3383280. Its totient is φ = 405504.

The previous prime is 1247419. The next prime is 1247429. The reversal of 1247424 is 4247421.

It is an interprime number because it is at equal distance from previous prime (1247419) and next prime (1247429).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1247394 and 1247403.

It is not an unprimeable number, because it can be changed into a prime (1247429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13972 + ... + 14060.

2^1247424 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 1247424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691640).

1247424 is an abundant number, since it is smaller than the sum of its proper divisors (2135856).

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

1247424 is an equidigital number, since it uses as much as digits as its factorization.

1247424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 167 counting only the distinct ones).

The product of its digits is 1792, while the sum is 24.

The square root of 1247424 is about 1116.8813723937. The cubic root of 1247424 is about 107.6476859617.

The spelling of 1247424 in words is "one million, two hundred forty-seven thousand, four hundred twenty-four".