1328021252 has 6 divisors (see below), whose sum is σ = 2324037198. Its totient is φ = 664010624.

The previous prime is 1328021239. The next prime is 1328021269. The reversal of 1328021252 is 2521208231.

It can be written as a sum of positive squares in only one way, i.e., 1292690116 + 35331136 = 35954^2 + 5944^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166002653 + ... + 166002660.

It is an arithmetic number, because the mean of its divisors is an integer number (387339533).

Almost surely, 2^1328021252 is an apocalyptic number.

It is an amenable number.

1328021252 is a deficient number, since it is larger than the sum of its proper divisors (996015946).

1328021252 is a wasteful number, since it uses less digits than its factorization.

1328021252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332005317 (or 332005315 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1328021252 is about 36442.0259041673. The cubic root of 1328021252 is about 1099.1787953470.

Adding to 1328021252 its reverse (2521208231), we get a palindrome (3849229483).

The spelling of 1328021252 in words is "one billion, three hundred twenty-eight million, twenty-one thousand, two hundred fifty-two".