1321755275 has 12 divisors (see below), whose sum is σ = 1644156672. Its totient is φ = 1054062240.

The previous prime is 1321755263. The next prime is 1321755307. The reversal of 1321755275 is 5725571231.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1321755275 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75467 + ... + 91316.

It is an arithmetic number, because the mean of its divisors is an integer number (137013056).

Almost surely, 2^1321755275 is an apocalyptic number.

1321755275 is a deficient number, since it is larger than the sum of its proper divisors (322401397).

1321755275 is a wasteful number, since it uses less digits than its factorization.

1321755275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167110 (or 167105 counting only the distinct ones).

The product of its digits is 73500, while the sum is 38.

The square root of 1321755275 is about 36355.9524012231. The cubic root of 1321755275 is about 1097.4473246097.

The spelling of 1321755275 in words is "one billion, three hundred twenty-one million, seven hundred fifty-five thousand, two hundred seventy-five".