1085813 has 2 divisors, whose sum is σ = 1085814. Its totient is φ = 1085812.

The previous prime is 1085809. The next prime is 1085827. The reversal of 1085813 is 3185801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 49 = 1042^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085813 - 2² = 1085809 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542906 + 542907.

It is an arithmetic number, because the mean of its divisors is an integer number (542907).

2^1085813 is an apocalyptic number.

It is an amenable number.

1085813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085813 is an equidigital number, since it uses as much as digits as its factorization.

1085813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1085813 is about 1042.0235122107. The cubic root of 1085813 is about 102.7823032718.

The spelling of 1085813 in words is "one million, eighty-five thousand, eight hundred thirteen".