1310540521 has 2 divisors, whose sum is σ = 1310540522. Its totient is φ = 1310540520.

The previous prime is 1310540513. The next prime is 1310540563. The reversal of 1310540521 is 1250450131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 897841296 + 412699225 = 29964^2 + 20315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310540521 - 2³ = 1310540513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1310540492 and 1310540501.

It is not a weakly prime, because it can be changed into another prime (1310540501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655270260 + 655270261.

It is an arithmetic number, because the mean of its divisors is an integer number (655270261).

Almost surely, 2^1310540521 is an apocalyptic number.

It is an amenable number.

1310540521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310540521 is an equidigital number, since it uses as much as digits as its factorization.

1310540521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1310540521 is about 36201.3883849777. The cubic root of 1310540521 is about 1094.3346516442.

Adding to 1310540521 its reverse (1250450131), we get a palindrome (2560990652).

The spelling of 1310540521 in words is "one billion, three hundred ten million, five hundred forty thousand, five hundred twenty-one".