1099161 has 24 divisors (see below), whose sum is σ = 1847040. Its totient is φ = 616896.

The previous prime is 1099139. The next prime is 1099171. The reversal of 1099161 is 1619901.

It is not a de Polignac number, because 1099161 - 2⁶ = 1099097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1099121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4480 + ... + 4718.

It is an arithmetic number, because the mean of its divisors is an integer number (76960).

2^1099161 is an apocalyptic number.

It is an amenable number.

1099161 is a deficient number, since it is larger than the sum of its proper divisors (747879).

1099161 is a wasteful number, since it uses less digits than its factorization.

1099161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 1099161 is about 1048.4087943164. The cubic root of 1099161 is about 103.2017599303.

The spelling of 1099161 in words is "one million, ninety-nine thousand, one hundred sixty-one".