1085409 has 12 divisors (see below), whose sum is σ = 1688596. Its totient is φ = 667872.
The previous prime is 1085407. The next prime is 1085419. The reversal of 1085409 is 9045801.
It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 567009 = 720^2 + 753^2 .
It is not a de Polignac number, because 1085409 - 21 = 1085407 is a prime.
It is a super-2 number, since 2×10854092 = 2356225394562, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (1085407) 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, 4522 + ... + 4755.
21085409 is an apocalyptic number.
It is an amenable number.
1085409 is a deficient number, since it is larger than the sum of its proper divisors (603187).
1085409 is a wasteful number, since it uses less digits than its factorization.
1085409 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9296 (or 9293 counting only the distinct ones).
The product of its (nonzero) digits is 1440, while the sum is 27.
The square root of 1085409 is about 1041.8296405843. The cubic root of 1085409 is about 102.7695542375.
The spelling of 1085409 in words is "one million, eighty-five thousand, four hundred nine".
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