1265338489 has 2 divisors, whose sum is σ = 1265338490. Its totient is φ = 1265338488.

The previous prime is 1265338471. The next prime is 1265338507. The reversal of 1265338489 is 9848335621.

It is a balanced prime because it is at equal distance from previous prime (1265338471) and next prime (1265338507).

It can be written as a sum of positive squares in only one way, i.e., 767290000 + 498048489 = 27700^2 + 22317^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265338489 - 2⁵ = 1265338457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265338889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632669244 + 632669245.

It is an arithmetic number, because the mean of its divisors is an integer number (632669245).

Almost surely, 2^1265338489 is an apocalyptic number.

It is an amenable number.

1265338489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265338489 is an equidigital number, since it uses as much as digits as its factorization.

1265338489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The square root of 1265338489 is about 35571.5966608191. The cubic root of 1265338489 is about 1081.6055477944.

The spelling of 1265338489 in words is "one billion, two hundred sixty-five million, three hundred thirty-eight thousand, four hundred eighty-nine".