1191053481 has 8 divisors (see below), whose sum is σ = 1595193600. Its totient is φ = 790474512.

The previous prime is 1191053467. The next prime is 1191053491. The reversal of 1191053481 is 1843501911.

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

It is a de Polignac number, because none of the positive numbers 2^k-1191053481 is a prime.

It is a super-2 number, since 2×1191053481² = 2837216789204434722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1191053491) 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, 889506 + ... + 890843.

It is an arithmetic number, because the mean of its divisors is an integer number (199399200).

Almost surely, 2^1191053481 is an apocalyptic number.

It is an amenable number.

1191053481 is a deficient number, since it is larger than the sum of its proper divisors (404140119).

1191053481 is a wasteful number, since it uses less digits than its factorization.

1191053481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780575.

The product of its (nonzero) digits is 4320, while the sum is 33.

The square root of 1191053481 is about 34511.6426876496. The cubic root of 1191053481 is about 1060.0111192022.

The spelling of 1191053481 in words is "one billion, one hundred ninety-one million, fifty-three thousand, four hundred eighty-one".