1265213353 has 2 divisors, whose sum is σ = 1265213354. Its totient is φ = 1265213352.

The previous prime is 1265213317. The next prime is 1265213387. The reversal of 1265213353 is 3533125621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 912825369 + 352387984 = 30213^2 + 18772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265213353 - 2²⁵ = 1231658921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265213153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632606676 + 632606677.

It is an arithmetic number, because the mean of its divisors is an integer number (632606677).

Almost surely, 2^1265213353 is an apocalyptic number.

It is an amenable number.

1265213353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265213353 is an equidigital number, since it uses as much as digits as its factorization.

1265213353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

The square root of 1265213353 is about 35569.8376858821. The cubic root of 1265213353 is about 1081.5698913923.

Adding to 1265213353 its reverse (3533125621), we get a palindrome (4798338974).

The spelling of 1265213353 in words is "one billion, two hundred sixty-five million, two hundred thirteen thousand, three hundred fifty-three".