1085399 has 12 divisors (see below), whose sum is σ = 1337904. Its totient is φ = 874944.

The previous prime is 1085389. The next prime is 1085407. The reversal of 1085399 is 9935801.

It is not a de Polignac number, because 1085399 - 2⁸ = 1085143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182 + ... + 1484.

It is an arithmetic number, because the mean of its divisors is an integer number (111492).

2^1085399 is an apocalyptic number.

1085399 is a deficient number, since it is larger than the sum of its proper divisors (252505).

1085399 is a wasteful number, since it uses less digits than its factorization.

1085399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1327 counting only the distinct ones).

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

The square root of 1085399 is about 1041.8248413241. The cubic root of 1085399 is about 102.7692386272.

It can be divided in two parts, 1085 and 399, that multiplied together give a triangular number (432915 = T₉₃₀).

The spelling of 1085399 in words is "one million, eighty-five thousand, three hundred ninety-nine".