1251328 has 48 divisors (see below), whose sum is σ = 2751840. Its totient is φ = 565248.

The previous prime is 1251323. The next prime is 1251329. The reversal of 1251328 is 8231521.

It is a junction number, because it is equal to n+sod(n) for n = 1251299 and 1251308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26601 + ... + 26647.

It is an arithmetic number, because the mean of its divisors is an integer number (57330).

2^1251328 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 1251328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375920).

1251328 is an abundant number, since it is smaller than the sum of its proper divisors (1500512).

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

1251328 is an equidigital number, since it uses as much as digits as its factorization.

1251328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 62 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1251328 is about 1118.6277307487. The cubic root of 1251328 is about 107.7598688570.

Adding to 1251328 its reverse (8231521), we get a palindrome (9482849).

The spelling of 1251328 in words is "one million, two hundred fifty-one thousand, three hundred twenty-eight".