1099385 has 16 divisors (see below), whose sum is σ = 1527552. Its totient is φ = 744000.

The previous prime is 1099369. The next prime is 1099391. The reversal of 1099385 is 5839901.

1099385 = T₈₉ + T₉₀ + ... + T₁₉₃.

It is not a de Polignac number, because 1099385 - 2⁴ = 1099369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3380 + ... + 3690.

It is an arithmetic number, because the mean of its divisors is an integer number (95472).

2^1099385 is an apocalyptic number.

It is an amenable number.

1099385 is a deficient number, since it is larger than the sum of its proper divisors (428167).

1099385 is a wasteful number, since it uses less digits than its factorization.

1099385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1099385 is about 1048.5156174326. The cubic root of 1099385 is about 103.2087700117.

The spelling of 1099385 in words is "one million, ninety-nine thousand, three hundred eighty-five".