1265662265 has 32 divisors (see below), whose sum is σ = 1796843520. Its totient is φ = 837504000.

The previous prime is 1265662253. The next prime is 1265662267. The reversal of 1265662265 is 5622665621.

It is not a de Polignac number, because 1265662265 - 2²⁶ = 1198553401 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1265662267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 433631 + ... + 436539.

It is an arithmetic number, because the mean of its divisors is an integer number (56151360).

Almost surely, 2^1265662265 is an apocalyptic number.

It is an amenable number.

1265662265 is a deficient number, since it is larger than the sum of its proper divisors (531181255).

1265662265 is a wasteful number, since it uses less digits than its factorization.

1265662265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353.

The product of its digits is 259200, while the sum is 41.

The square root of 1265662265 is about 35576.1474164924. The cubic root of 1265662265 is about 1081.6977940076.

The spelling of 1265662265 in words is "one billion, two hundred sixty-five million, six hundred sixty-two thousand, two hundred sixty-five".