1171128459 has 4 divisors (see below), whose sum is σ = 1561504616. Its totient is φ = 780752304.

The previous prime is 1171128451. The next prime is 1171128461. The reversal of 1171128459 is 9548211711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1171128459 - 2³ = 1171128451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171128451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195188074 + ... + 195188079.

It is an arithmetic number, because the mean of its divisors is an integer number (390376154).

Almost surely, 2^1171128459 is an apocalyptic number.

1171128459 is a deficient number, since it is larger than the sum of its proper divisors (390376157).

1171128459 is an equidigital number, since it uses as much as digits as its factorization.

1171128459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390376156.

The product of its digits is 20160, while the sum is 39.

The square root of 1171128459 is about 34221.7541777157. The cubic root of 1171128459 is about 1054.0669060023.

The spelling of 1171128459 in words is "one billion, one hundred seventy-one million, one hundred twenty-eight thousand, four hundred fifty-nine".