1321275368 has 32 divisors (see below), whose sum is σ = 2850072960. Its totient is φ = 562507200.

The previous prime is 1321275353. The next prime is 1321275391. The reversal of 1321275368 is 8635721231.

1321275368 is nontrivially palindromic in base 11.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69671 + ... + 86582.

It is an arithmetic number, because the mean of its divisors is an integer number (89064780).

Almost surely, 2^1321275368 is an apocalyptic number.

It is an amenable number.

1321275368 is an abundant number, since it is smaller than the sum of its proper divisors (1528797592).

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

1321275368 is a wasteful number, since it uses less digits than its factorization.

1321275368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156417 (or 156413 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 1321275368 is about 36349.3516861030. The cubic root of 1321275368 is about 1097.3144870065.

Adding to 1321275368 its reverse (8635721231), we get a palindrome (9956996599).

The spelling of 1321275368 in words is "one billion, three hundred twenty-one million, two hundred seventy-five thousand, three hundred sixty-eight".