1265530455 has 24 divisors (see below), whose sum is σ = 2506956192. Its totient is φ = 578528064.

The previous prime is 1265530429. The next prime is 1265530493. The reversal of 1265530455 is 5540355621.

1265530455 is a `hidden beast` number, since 12 + 65 + 530 + 4 + 55 = 666.

It is not a de Polignac number, because 1265530455 - 2⁷ = 1265530327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2008464 + ... + 2009093.

It is an arithmetic number, because the mean of its divisors is an integer number (104456508).

Almost surely, 2^1265530455 is an apocalyptic number.

1265530455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1265530455 is a deficient number, since it is larger than the sum of its proper divisors (1241425737).

1265530455 is a wasteful number, since it uses less digits than its factorization.

1265530455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017575 (or 4017572 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 1265530455 is about 35574.2948630047. The cubic root of 1265530455 is about 1081.6602422479.

The spelling of 1265530455 in words is "one billion, two hundred sixty-five million, five hundred thirty thousand, four hundred fifty-five".