1320540635 has 8 divisors (see below), whose sum is σ = 1635766656. Its totient is φ = 1022353920.

The previous prime is 1320540593. The next prime is 1320540691. The reversal of 1320540635 is 5360450231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320540635 - 2¹⁰ = 1320539611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320540598 and 1320540607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4259654 + ... + 4259963.

It is an arithmetic number, because the mean of its divisors is an integer number (204470832).

Almost surely, 2^1320540635 is an apocalyptic number.

1320540635 is a deficient number, since it is larger than the sum of its proper divisors (315226021).

1320540635 is an equidigital number, since it uses as much as digits as its factorization.

1320540635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8519653.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 1320540635 is about 36339.2437318115. The cubic root of 1320540635 is about 1097.1110515800. Note that the first 3 decimals are identical.

Adding to 1320540635 its reverse (5360450231), we get a palindrome (6680990866).

The spelling of 1320540635 in words is "one billion, three hundred twenty million, five hundred forty thousand, six hundred thirty-five".