1320540585 has 32 divisors (see below), whose sum is σ = 2600451840. Its totient is φ = 557238528.

The previous prime is 1320540583. The next prime is 1320540593. The reversal of 1320540585 is 5850450231.

It is not a de Polignac number, because 1320540585 - 2¹ = 1320540583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320540583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482350 + ... + 485079.

It is an arithmetic number, because the mean of its divisors is an integer number (81264120).

Almost surely, 2^1320540585 is an apocalyptic number.

1320540585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320540585 is a deficient number, since it is larger than the sum of its proper divisors (1279911255).

1320540585 is a wasteful number, since it uses less digits than its factorization.

1320540585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967457.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 1320540585 is about 36339.2430438500. The cubic root of 1320540585 is about 1097.1110377333. Note that the first 3 decimals are identical.

It can be divided in two parts, 1320540 and 585, that added together give a triangular number (1321125 = T₁₆₂₅).

The spelling of 1320540585 in words is "one billion, three hundred twenty million, five hundred forty thousand, five hundred eighty-five".