1149638265 has 40 divisors (see below), whose sum is σ = 2066834880. Its totient is φ = 611355168.

The previous prime is 1149638261. The next prime is 1149638297. The reversal of 1149638265 is 5628369411.

1149638265 is a `hidden beast` number, since 1 + 1 + 4 + 9 + 638 + 2 + 6 + 5 = 666.

It is not a de Polignac number, because 1149638265 - 2² = 1149638261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1149638265.

It is not an unprimeable number, because it can be changed into a prime (1149638261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 141442 + ... + 149348.

It is an arithmetic number, because the mean of its divisors is an integer number (51670872).

Almost surely, 2^1149638265 is an apocalyptic number.

1149638265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1149638265 is a deficient number, since it is larger than the sum of its proper divisors (917196615).

1149638265 is an equidigital number, since it uses as much as digits as its factorization.

1149638265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8283 (or 8274 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1149638265 is about 33906.3160045441. The cubic root of 1149638265 is about 1047.5796906428.

The spelling of 1149638265 in words is "one billion, one hundred forty-nine million, six hundred thirty-eight thousand, two hundred sixty-five".