1328021275 has 36 divisors (see below), whose sum is σ = 1942710480. Its totient is φ = 897758400.

The previous prime is 1328021269. The next prime is 1328021287. The reversal of 1328021275 is 5721208231.

It is not a de Polignac number, because 1328021275 - 2¹⁷ = 1327890203 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 79341 + ... + 94609.

It is an arithmetic number, because the mean of its divisors is an integer number (53964180).

Almost surely, 2^1328021275 is an apocalyptic number.

1328021275 is a deficient number, since it is larger than the sum of its proper divisors (614689205).

1328021275 is a wasteful number, since it uses less digits than its factorization.

1328021275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15364 (or 15352 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1328021275 is about 36442.0262197370. The cubic root of 1328021275 is about 1099.1788016925.

The spelling of 1328021275 in words is "one billion, three hundred twenty-eight million, twenty-one thousand, two hundred seventy-five".