1206385 has 8 divisors (see below), whose sum is σ = 1487016. Its totient is φ = 938880.

The previous prime is 1206383. The next prime is 1206391. The reversal of 1206385 is 5836021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 627264 + 579121 = 792^2 + 761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1206385 - 2¹ = 1206383 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1206383) 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, 3076 + ... + 3445.

It is an arithmetic number, because the mean of its divisors is an integer number (185877).

2^1206385 is an apocalyptic number.

It is an amenable number.

1206385 is a deficient number, since it is larger than the sum of its proper divisors (280631).

1206385 is an equidigital number, since it uses as much as digits as its factorization.

1206385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1206385 is about 1098.3555890512. The cubic root of 1206385 is about 106.4539979273.

The spelling of 1206385 in words is "one million, two hundred six thousand, three hundred eighty-five".