1094806921 has 4 divisors (see below), whose sum is σ = 1179022852. Its totient is φ = 1010590992.

The previous prime is 1094806913. The next prime is 1094806939. The reversal of 1094806921 is 1296084901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1296084901 = 107 ⋅12112943.

It can be written as a sum of positive squares in 2 ways, for example, as 315559696 + 779247225 = 17764^2 + 27915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1094806921 - 2³ = 1094806913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1094806901) 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, 42107946 + ... + 42107971.

It is an arithmetic number, because the mean of its divisors is an integer number (294755713).

Almost surely, 2^1094806921 is an apocalyptic number.

It is an amenable number.

1094806921 is a deficient number, since it is larger than the sum of its proper divisors (84215931).

1094806921 is an equidigital number, since it uses as much as digits as its factorization.

1094806921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84215930.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1094806921 is about 33087.8666734500. The cubic root of 1094806921 is about 1030.6530941457.

The spelling of 1094806921 in words is "one billion, ninety-four million, eight hundred six thousand, nine hundred twenty-one".