1265339329 has 2 divisors, whose sum is σ = 1265339330. Its totient is φ = 1265339328.

The previous prime is 1265339321. The next prime is 1265339377. The reversal of 1265339329 is 9239335621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137038400 + 128300929 = 33720^2 + 11327^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265339329 - 2³ = 1265339321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265339321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632669664 + 632669665.

It is an arithmetic number, because the mean of its divisors is an integer number (632669665).

Almost surely, 2^1265339329 is an apocalyptic number.

It is an amenable number.

1265339329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265339329 is an equidigital number, since it uses as much as digits as its factorization.

1265339329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 43.

The square root of 1265339329 is about 35571.6084679903. The cubic root of 1265339329 is about 1081.6057871370.

The spelling of 1265339329 in words is "one billion, two hundred sixty-five million, three hundred thirty-nine thousand, three hundred twenty-nine".