7212806 has 8 divisors (see below), whose sum is σ = 10844064. Its totient is φ = 3598120.

The previous prime is 7212797. The next prime is 7212833. The reversal of 7212806 is 6082127.

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

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 2990 + ... + 4833.

It is an arithmetic number, because the mean of its divisors is an integer number (1355508).

Almost surely, 2^7212806 is an apocalyptic number.

7212806 is a deficient number, since it is larger than the sum of its proper divisors (3631258).

7212806 is a wasteful number, since it uses less digits than its factorization.

7212806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8286.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 7212806 is about 2685.6667700964. Note that the first 3 decimals coincide. The cubic root of 7212806 is about 193.2122911249.

The spelling of 7212806 in words is "seven million, two hundred twelve thousand, eight hundred six".