1321743248 has 30 divisors (see below), whose sum is σ = 2978981766. Its totient is φ = 566461056.

The previous prime is 1321743239. The next prime is 1321743289. The reversal of 1321743248 is 8423471231.

It can be written as a sum of positive squares in only one way, i.e., 933180304 + 388562944 = 30548^2 + 19712^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 842165 + ... + 843732.

Almost surely, 2^1321743248 is an apocalyptic number.

It is an amenable number.

1321743248 is an abundant number, since it is smaller than the sum of its proper divisors (1657238518).

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

1321743248 is a wasteful number, since it uses less digits than its factorization.

1321743248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685919 (or 1685906 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 1321743248 is about 36355.7869946450. The cubic root of 1321743248 is about 1097.4439959453.

It can be divided in two parts, 13217 and 43248, that added together give a palindrome (56465).

The spelling of 1321743248 in words is "one billion, three hundred twenty-one million, seven hundred forty-three thousand, two hundred forty-eight".