1091057105 has 8 divisors (see below), whose sum is σ = 1312308864. Its totient is φ = 870818800.

The previous prime is 1091057057. The next prime is 1091057129. The reversal of 1091057105 is 5017501901.

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

It is not a de Polignac number, because 1091057105 - 2⁸ = 1091056849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250991 + ... + 255300.

It is an arithmetic number, because the mean of its divisors is an integer number (164038608).

Almost surely, 2^1091057105 is an apocalyptic number.

It is an amenable number.

1091057105 is a deficient number, since it is larger than the sum of its proper divisors (221251759).

1091057105 is an equidigital number, since it uses as much as digits as its factorization.

1091057105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506727.

The product of its (nonzero) digits is 1575, while the sum is 29.

The square root of 1091057105 is about 33031.1535523663. The cubic root of 1091057105 is about 1029.4750537713.

The spelling of 1091057105 in words is "one billion, ninety-one million, fifty-seven thousand, one hundred five".