1206869 has 2 divisors, whose sum is σ = 1206870. Its totient is φ = 1206868.

The previous prime is 1206841. The next prime is 1206941. The reversal of 1206869 is 9686021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1188100 + 18769 = 1090^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206869 - 2²⁰ = 158293 is a prime.

It is a super-2 number, since 2×1206869² = 2913065566322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603434 + 603435.

It is an arithmetic number, because the mean of its divisors is an integer number (603435).

2^1206869 is an apocalyptic number.

It is an amenable number.

1206869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206869 is an equidigital number, since it uses as much as digits as its factorization.

1206869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1206869 is about 1098.5758963312. The cubic root of 1206869 is about 106.4682324230.

The spelling of 1206869 in words is "one million, two hundred six thousand, eight hundred sixty-nine".