1320263501 has 2 divisors, whose sum is σ = 1320263502. Its totient is φ = 1320263500.

The previous prime is 1320263467. The next prime is 1320263519. The reversal of 1320263501 is 1053620231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678654601 + 641608900 = 26051^2 + 25330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320263501 - 2⁶ = 1320263437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320263551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660131750 + 660131751.

It is an arithmetic number, because the mean of its divisors is an integer number (660131751).

Almost surely, 2^1320263501 is an apocalyptic number.

It is an amenable number.

1320263501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320263501 is an equidigital number, since it uses as much as digits as its factorization.

1320263501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1320263501 is about 36335.4303813784. The cubic root of 1320263501 is about 1097.0342981559.

Adding to 1320263501 its reverse (1053620231), we get a palindrome (2373883732).

The spelling of 1320263501 in words is "one billion, three hundred twenty million, two hundred sixty-three thousand, five hundred one".