1171391267 has 8 divisors (see below), whose sum is σ = 1177781760. Its totient is φ = 1165016520.

The previous prime is 1171391257. The next prime is 1171391269. The reversal of 1171391267 is 7621931711.

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

It is a cyclic number.

It is not a de Polignac number, because 1171391267 - 2²² = 1167196963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1171391267.

It is not an unprimeable number, because it can be changed into a prime (1171391269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164258 + ... + 171240.

It is an arithmetic number, because the mean of its divisors is an integer number (147222720).

Almost surely, 2^1171391267 is an apocalyptic number.

1171391267 is a deficient number, since it is larger than the sum of its proper divisors (6390493).

1171391267 is an equidigital number, since it uses as much as digits as its factorization.

1171391267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873.

The product of its digits is 15876, while the sum is 38.

The square root of 1171391267 is about 34225.5937421106. The cubic root of 1171391267 is about 1054.1457463420.

The spelling of 1171391267 in words is "one billion, one hundred seventy-one million, three hundred ninety-one thousand, two hundred sixty-seven".