1320540523 has 2 divisors, whose sum is σ = 1320540524. Its totient is φ = 1320540522.

The previous prime is 1320540517. The next prime is 1320540553. The reversal of 1320540523 is 3250450231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320540523 is a prime.

It is a super-2 number, since 2×1320540523² = 3487654545770227058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1320540503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660270261 + 660270262.

It is an arithmetic number, because the mean of its divisors is an integer number (660270262).

Almost surely, 2^1320540523 is an apocalyptic number.

1320540523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320540523 is an equidigital number, since it uses as much as digits as its factorization.

1320540523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1320540523 is about 36339.2421907777. The cubic root of 1320540523 is about 1097.1110205633. Note that the first 3 decimals are identical.

Adding to 1320540523 its reverse (3250450231), we get a palindrome (4570990754).

The spelling of 1320540523 in words is "one billion, three hundred twenty million, five hundred forty thousand, five hundred twenty-three".