1265465329 has 4 divisors (see below), whose sum is σ = 1339904484. Its totient is φ = 1191026176.

The previous prime is 1265465323. The next prime is 1265465339. The reversal of 1265465329 is 9235645621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9235645621 = 241 ⋅38322181.

It can be written as a sum of positive squares in 2 ways, for example, as 934952929 + 330512400 = 30577^2 + 18180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265465329 - 2⁵ = 1265465297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265465323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37219552 + ... + 37219585.

It is an arithmetic number, because the mean of its divisors is an integer number (334976121).

Almost surely, 2^1265465329 is an apocalyptic number.

It is an amenable number.

1265465329 is a deficient number, since it is larger than the sum of its proper divisors (74439155).

1265465329 is an equidigital number, since it uses as much as digits as its factorization.

1265465329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74439154.

The product of its digits is 388800, while the sum is 43.

The square root of 1265465329 is about 35573.3794992829. The cubic root of 1265465329 is about 1081.6416873373.

The spelling of 1265465329 in words is "one billion, two hundred sixty-five million, four hundred sixty-five thousand, three hundred twenty-nine".