1161279267 has 8 divisors (see below), whose sum is σ = 1559674896. Its totient is φ = 768534912.

The previous prime is 1161279257. The next prime is 1161279271. The reversal of 1161279267 is 7629721611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161279267 - 2⁷ = 1161279139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161279227) 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 7 ways as a sum of consecutive naturals, for example, 1412338 + ... + 1413159.

It is an arithmetic number, because the mean of its divisors is an integer number (194959362).

Almost surely, 2^1161279267 is an apocalyptic number.

1161279267 is a deficient number, since it is larger than the sum of its proper divisors (398395629).

1161279267 is a wasteful number, since it uses less digits than its factorization.

1161279267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825637.

The product of its digits is 63504, while the sum is 42.

The square root of 1161279267 is about 34077.5478431181. The cubic root of 1161279267 is about 1051.1036821151.

The spelling of 1161279267 in words is "one billion, one hundred sixty-one million, two hundred seventy-nine thousand, two hundred sixty-seven".