1330750561 has 4 divisors (see below), whose sum is σ = 1520857792. Its totient is φ = 1140643332.

The previous prime is 1330750559. The next prime is 1330750573. The reversal of 1330750561 is 1650570331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1650570331 = 1553 ⋅1062827.

It is a cyclic number.

It is not a de Polignac number, because 1330750561 - 2¹ = 1330750559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1330750511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95053605 + ... + 95053618.

It is an arithmetic number, because the mean of its divisors is an integer number (380214448).

Almost surely, 2^1330750561 is an apocalyptic number.

It is an amenable number.

1330750561 is a deficient number, since it is larger than the sum of its proper divisors (190107231).

1330750561 is an equidigital number, since it uses as much as digits as its factorization.

1330750561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190107230.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 1330750561 is about 36479.4539569879. The cubic root of 1330750561 is about 1099.9312797290.

The spelling of 1330750561 in words is "one billion, three hundred thirty million, seven hundred fifty thousand, five hundred sixty-one".