1641206 has 12 divisors (see below), whose sum is σ = 2863908. Its totient is φ = 703332.

The previous prime is 1641161. The next prime is 1641217. The reversal of 1641206 is 6021461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8276 + ... + 8471.

It is an arithmetic number, because the mean of its divisors is an integer number (238659).

2^1641206 is an apocalyptic number.

1641206 is a deficient number, since it is larger than the sum of its proper divisors (1222702).

1641206 is a wasteful number, since it uses less digits than its factorization.

1641206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16763 (or 16756 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1641206 is about 1281.0956248462. The cubic root of 1641206 is about 117.9562703039.

Adding to 1641206 its reverse (6021461), we get a palindrome (7662667).

The spelling of 1641206 in words is "one million, six hundred forty-one thousand, two hundred six".