1321797762 has 24 divisors (see below), whose sum is σ = 2869058556. Its totient is φ = 439804896.

The previous prime is 1321797733. The next prime is 1321797803. The reversal of 1321797762 is 2677971231.

It can be written as a sum of positive squares in 2 ways, for example, as 1068701481 + 253096281 = 32691^2 + 15909^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55893 + ... + 75944.

Almost surely, 2^1321797762 is an apocalyptic number.

1321797762 is an abundant number, since it is smaller than the sum of its proper divisors (1547260794).

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

1321797762 is a wasteful number, since it uses less digits than its factorization.

1321797762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132402 (or 132399 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 1321797762 is about 36356.5367162495. The cubic root of 1321797762 is about 1097.4590834039.

The spelling of 1321797762 in words is "one billion, three hundred twenty-one million, seven hundred ninety-seven thousand, seven hundred sixty-two".