1265768345 has 16 divisors (see below), whose sum is σ = 1532657808. Its totient is φ = 1003484160.

The previous prime is 1265768321. The next prime is 1265768411. The reversal of 1265768345 is 5438675621.

It can be written as a sum of positive squares in 8 ways, for example, as 51036736 + 1214731609 = 7144^2 + 34853^2 .

It is not a de Polignac number, because 1265768345 - 2⁶ = 1265768281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265768345.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517325 + ... + 519765.

It is an arithmetic number, because the mean of its divisors is an integer number (95791113).

Almost surely, 2^1265768345 is an apocalyptic number.

It is an amenable number.

1265768345 is a deficient number, since it is larger than the sum of its proper divisors (266889463).

1265768345 is a wasteful number, since it uses less digits than its factorization.

1265768345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340.

The product of its digits is 1209600, while the sum is 47.

The square root of 1265768345 is about 35577.6382718134. The cubic root of 1265768345 is about 1081.7280135745.

The spelling of 1265768345 in words is "one billion, two hundred sixty-five million, seven hundred sixty-eight thousand, three hundred forty-five".