1265336505 has 32 divisors (see below), whose sum is σ = 2258956800. Its totient is φ = 672005376.

The previous prime is 1265336489. The next prime is 1265336509. The reversal of 1265336505 is 5056335621.

It is not a de Polignac number, because 1265336505 - 2⁴ = 1265336489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265336505.

It is not an unprimeable number, because it can be changed into a prime (1265336509) 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, 12657 + ... + 51873.

It is an arithmetic number, because the mean of its divisors is an integer number (70592400).

Almost surely, 2^1265336505 is an apocalyptic number.

1265336505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265336505 is a deficient number, since it is larger than the sum of its proper divisors (993620295).

1265336505 is a wasteful number, since it uses less digits than its factorization.

1265336505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39470 (or 39464 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 1265336505 is about 35571.5687733898. The cubic root of 1265336505 is about 1081.6049824893.

The spelling of 1265336505 in words is "one billion, two hundred sixty-five million, three hundred thirty-six thousand, five hundred five".