1161271751 has 8 divisors (see below), whose sum is σ = 1262814480. Its totient is φ = 1063421568.

The previous prime is 1161271739. The next prime is 1161271753. The reversal of 1161271751 is 1571721611.

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 1161271751 - 2¹⁰ = 1161270727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161271753) 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, 922481 + ... + 923738.

It is an arithmetic number, because the mean of its divisors is an integer number (157851810).

Almost surely, 2^1161271751 is an apocalyptic number.

1161271751 is a deficient number, since it is larger than the sum of its proper divisors (101542729).

1161271751 is a wasteful number, since it uses less digits than its factorization.

1161271751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846273.

The product of its digits is 2940, while the sum is 32.

The square root of 1161271751 is about 34077.4375650517. The cubic root of 1161271751 is about 1051.1014144687.

The spelling of 1161271751 in words is "one billion, one hundred sixty-one million, two hundred seventy-one thousand, seven hundred fifty-one".