1165215411 has 24 divisors (see below), whose sum is σ = 1783388880. Its totient is φ = 730584576.

The previous prime is 1165215409. The next prime is 1165215431. The reversal of 1165215411 is 1145125611.

1165215411 is a `hidden beast` number, since 1 + 1 + 652 + 1 + 5 + 4 + 1 + 1 = 666.

It is not a de Polignac number, because 1165215411 - 2¹ = 1165215409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165215431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393111 + ... + 396063.

It is an arithmetic number, because the mean of its divisors is an integer number (74307870).

Almost surely, 2^1165215411 is an apocalyptic number.

1165215411 is a deficient number, since it is larger than the sum of its proper divisors (618173469).

1165215411 is a wasteful number, since it uses less digits than its factorization.

1165215411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555 (or 5552 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 1165215411 is about 34135.2517348269. The cubic root of 1165215411 is about 1052.2899112194.

The spelling of 1165215411 in words is "one billion, one hundred sixty-five million, two hundred fifteen thousand, four hundred eleven".