1086509 has 2 divisors, whose sum is σ = 1086510. Its totient is φ = 1086508.

The previous prime is 1086493. The next prime is 1086511. The reversal of 1086509 is 9056801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1044484 + 42025 = 1022^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1086509 - 2⁴ = 1086493 is a prime.

Together with 1086511, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1086529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543254 + 543255.

It is an arithmetic number, because the mean of its divisors is an integer number (543255).

2^1086509 is an apocalyptic number.

It is an amenable number.

1086509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1086509 is an equidigital number, since it uses as much as digits as its factorization.

1086509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1086509 is about 1042.3574243032. The cubic root of 1086509 is about 102.8042595398.

The spelling of 1086509 in words is "one million, eighty-six thousand, five hundred nine".