1094991405 has 16 divisors (see below), whose sum is σ = 1752404544. Its totient is φ = 583856000.

The previous prime is 1094991397. The next prime is 1094991409. The reversal of 1094991405 is 5041994901.

It is a happy number.

It is not a de Polignac number, because 1094991405 - 2³ = 1094991397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1094991409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99802 + ... + 110228.

It is an arithmetic number, because the mean of its divisors is an integer number (109525284).

Almost surely, 2^1094991405 is an apocalyptic number.

1094991405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1094991405 is a deficient number, since it is larger than the sum of its proper divisors (657413139).

1094991405 is a wasteful number, since it uses less digits than its factorization.

1094991405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17436.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1094991405 is about 33090.6543452982. The cubic root of 1094991405 is about 1030.7109820779.

The spelling of 1094991405 in words is "one billion, ninety-four million, nine hundred ninety-one thousand, four hundred five".