1086399 has 8 divisors (see below), whose sum is σ = 1609520. Its totient is φ = 724248.

The previous prime is 1086391. The next prime is 1086413. The reversal of 1086399 is 9936801.

1086399 is a `hidden beast` number, since 10 + 8 + 639 + 9 = 666.

It is not a de Polignac number, because 1086399 - 2³ = 1086391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20092 + ... + 20145.

It is an arithmetic number, because the mean of its divisors is an integer number (201190).

2^1086399 is an apocalyptic number.

1086399 is a deficient number, since it is larger than the sum of its proper divisors (523121).

1086399 is an equidigital number, since it uses as much as digits as its factorization.

1086399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40246 (or 40240 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1086399 is about 1042.3046579575. The cubic root of 1086399 is about 102.8007900639.

It can be divided in two parts, 1086 and 399, that added together give a triangular number (1485 = T₅₄).

The spelling of 1086399 in words is "one million, eighty-six thousand, three hundred ninety-nine".