1820206 has 4 divisors (see below), whose sum is σ = 2730312. Its totient is φ = 910102.

The previous prime is 1820201. The next prime is 1820213. The reversal of 1820206 is 6020281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455050 + ... + 455053.

It is an arithmetic number, because the mean of its divisors is an integer number (682578).

2^1820206 is an apocalyptic number.

1820206 is a deficient number, since it is larger than the sum of its proper divisors (910106).

1820206 is an equidigital number, since it uses as much as digits as its factorization.

1820206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910105.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1820206 is about 1349.1501028425. The cubic root of 1820206 is about 122.0975212369.

Adding to 1820206 its reverse (6020281), we get a palindrome (7840487).

The spelling of 1820206 in words is "one million, eight hundred twenty thousand, two hundred six".