1165195971 has 12 divisors (see below), whose sum is σ = 1728549472. Its totient is φ = 755802576.

The previous prime is 1165195931. The next prime is 1165195973. The reversal of 1165195971 is 1795915611.

It is a happy number.

1165195971 is a `hidden beast` number, since 1 + 1 + 6 + 51 + 9 + 597 + 1 = 666.

It is not a de Polignac number, because 1165195971 - 2¹⁵ = 1165163203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165195973) 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 11 ways as a sum of consecutive naturals, for example, 1749211 + ... + 1749876.

Almost surely, 2^1165195971 is an apocalyptic number.

1165195971 is a deficient number, since it is larger than the sum of its proper divisors (563353501).

1165195971 is a wasteful number, since it uses less digits than its factorization.

1165195971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499130 (or 3499127 counting only the distinct ones).

The product of its digits is 85050, while the sum is 45.

The square root of 1165195971 is about 34134.9669840180. The cubic root of 1165195971 is about 1052.2840591886.

It can be divided in two parts, 1165 and 195971, that added together give a square (197136 = 444²).

The spelling of 1165195971 in words is "one billion, one hundred sixty-five million, one hundred ninety-five thousand, nine hundred seventy-one".