1155635265 has 16 divisors (see below), whose sum is σ = 1957782528. Its totient is φ = 580083456.

The previous prime is 1155635251. The next prime is 1155635279. The reversal of 1155635265 is 5625365511.

It is an interprime number because it is at equal distance from previous prime (1155635251) and next prime (1155635279).

It is not a de Polignac number, because 1155635265 - 2¹¹ = 1155633217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2265697 + ... + 2266206.

It is an arithmetic number, because the mean of its divisors is an integer number (122361408).

Almost surely, 2^1155635265 is an apocalyptic number.

1155635265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155635265 is a deficient number, since it is larger than the sum of its proper divisors (802147263).

1155635265 is a wasteful number, since it uses less digits than its factorization.

1155635265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531928.

The product of its digits is 135000, while the sum is 39.

The square root of 1155635265 is about 33994.6358268477. The cubic root of 1155635265 is about 1049.3980722357.

The spelling of 1155635265 in words is "one billion, one hundred fifty-five million, six hundred thirty-five thousand, two hundred sixty-five".