1247328 has 72 divisors (see below), whose sum is σ = 3656016. Its totient is φ = 403200.

The previous prime is 1247327. The next prime is 1247329. The reversal of 1247328 is 8237421.

It is an interprime number because it is at equal distance from previous prime (1247327) and next prime (1247329).

It is a tau number, because it is divible by the number of its divisors (72).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247321) 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, 17533 + ... + 17603.

It is an arithmetic number, because the mean of its divisors is an integer number (50778).

2^1247328 is an apocalyptic number.

1247328 is a gapful number since it is divisible by the number (18) 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 1247328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828008).

1247328 is an abundant number, since it is smaller than the sum of its proper divisors (2408688).

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

1247328 is a wasteful number, since it uses less digits than its factorization.

1247328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 137 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1247328 is about 1116.8383947555. The cubic root of 1247328 is about 107.6449244193.

The spelling of 1247328 in words is "one million, two hundred forty-seven thousand, three hundred twenty-eight".